Yukon Gear Application Guide

Ford 8.8" and GM 8.5"/8.6" parts from Yukon’s 2015 catalog. Linked part numbers are in the DiffGears catalog (77 of 220 unique parts). The 2026 fitment column counts vehicles in the Randy’s Worldwide extract from 10 October 2026. A number missing from that file may be discontinued. Confirm the axle, carrier break, rotation, and spline before ordering.

Ford

Ford 8.8" passenger car and truck

Ring gear 8.8". Ring-gear bolts (12) 7/16" × 20 RH. Cover bolts 10. Carrier break: none. Pinion shaft 1.625" / 28 spline. Reverse-rotation rows are the IFS front sets.

18 of 18 ring-and-pinion numbers from this chapter are still in the Oct 2026 fitment file.

Ford 8.8" parts Standard-cut gears Reverse-cut gears Install kits

Ring and pinion

Part number	Ratio	Notes	2026 fitment
YG F8.8-308	3.08	—	90 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-327	3.27	—	90 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-331	3.31	—	90 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-355	3.55	—	90 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-373	3.73	—	93 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-411	4.11	—	90 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-430	4.30	—	89 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-456	4.56	—	89 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-488	4.88	—	89 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-513	5.13	—	89 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8-571	5.71	—	89 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YG F8.8R-331R	3.31	reverse rotation	10 vehicles — Ford 8.8" Reverse Front 28 Spline; Ford 8.8" Reverse Front 31 spline
YG F8.8R-355R	3.55	reverse rotation	10 vehicles — Ford 8.8" Reverse Front 28 Spline; Ford 8.8" Reverse Front 31 spline
YG F8.8R-373R	3.73	reverse rotation	10 vehicles — Ford 8.8" Reverse Front 28 Spline; Ford 8.8" Reverse Front 31 spline
YG F8.8R-411R	4.11	reverse rotation	10 vehicles — Ford 8.8" Reverse Front 28 Spline; Ford 8.8" Reverse Front 31 spline
YG F8.8R-456R	4.56	reverse rotation	10 vehicles — Ford 8.8" Reverse Front 28 Spline; Ford 8.8" Reverse Front 31 spline
YG F8.8R-488R	4.88	reverse rotation	10 vehicles — Ford 8.8" Reverse Front 28 Spline; Ford 8.8" Reverse Front 31 spline
YG F8.8R-513R	5.13	reverse rotation	9 vehicles — Ford 8.8" Reverse Front 28 Spline; Ford 8.8" Reverse Front 31 spline

Unit bearings

Part number	Description	2026 fitment
YB U516008	IRS unit bearing	Not in the Oct 2026 file

Spider gear kits

Part number	Description	2026 fitment
YPKF8.8-P-28	Dura Grip & Eaton posi spider gear kit 28 spline	31 vehicles — Ford 8.8" - 28 Spline
YPKF8.8-P-31	Dura Grip & Eaton posi spider gear kit 31 spline	44 vehicles — Ford 8.8" - 31 Spline
YPKF8.8-PC	Trac Loc clutch set, early design w/long tabs	88 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+2 more)
YPKF8.8-PC-C	Trac Loc clutch set, 2003 & up SVT Cobra only	89 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YPKF8.8-PC-L	Trac Loc clutch set, late design w/short tabs	89 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YPKF8.8-S-28	Standard spider gear kit, 28 spline	35 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" Reverse Front 28 Spline
YPKF8.8-S-28IRS	Standard spider gear kit, 28 spline IRS	3 vehicles — Ford 8.8" IRS Passenger Car 28 Spline
YPKF8.8-S-31	Standard spider gear kit, 31 spline	81 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+2 more)
YPKF8.8-T/L-31	Trac Loc spider gear kit, 31 spline w/o clutches or cross pin shaft	48 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" IRS Passenger Car 28 Spline; Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline
YPKGM12-PC-DG1	Dura Grip clutch kit, 14 piece composite clutches	378 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-SHIM	Dura Grip posi shim kit	374 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-14	Dura Grip & Eaton posi clutch set 14 Carbon clutches	381 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-18	Dura Grip & Eaton posi clutch set 18 steel clutches	378 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-22	Dura Grip & Eaton posi clutch set 22 steel clutches	Not in the Oct 2026 file

Overhaul and install kits

Part number	Description	2026 fitment
YK F8.8-A	Master Overhaul kit, 2009 & down	51 vehicles — Ford 8.8" - 28 Spline
YK F8.8-B	Master Overhaul kit, 2010 F150 & 2010 & up Mustangs	3 vehicles — Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline
YK F8.8-C	Master Overhaul kit, 2011 & up F150	2 vehicles — Ford 8.8" - 31 Spline
YK F8.8-IRS-L	Master Overhaul kit, IRS passenger car	8 vehicles — Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline; Ford 8.8" IRS Passenger Car 31 Spline
YK F8.8-IRS-SUV	Master Overhaul kit IRS SUV	18 vehicles — Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline; Ford 8.8" IRS Passenger Car 31 Spline
YK F8.8-REV	Master Overhaul kit, IFS front	5 vehicles — Ford 8.8" Reverse Front 28 Spline
BK F8.8	Bearing installation kit, 2009 & down	65 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
PK F8.8	Pinion installation kit, 2009 & down	Not in the Oct 2026 file
MK F8.8	Minimum installation kit	78 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
CK F8.8	Carrier installation kit	145 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+5 more)

Axle bearing and seal kits

Part number	Description	2026 fitment
AK 1559	Axle Bearing & Seal kit, 2.530" O.D., non-IRS	407 vehicles — Chrysler 9.25" Rear, '00 & older; Chrysler 8.25", '76-'96; GM 12 Bolt Truck (+8 more)
AK 1563	Axle Bearing & Seal kit, 2.250" O.D., non-IRS	216 vehicles — Ford 7.5; GM 7.5" Rear, '81 & older; GM 12 Bolt Passenger Car (+6 more)
AK 1561FD	Axle Bearing & Seal kit, 2.985" O.D.	117 vehicles — Ford 9.75" (9 3/4 inch), '97-'98; Chrysler 9.25" Rear, '00 & older; Ford 9.75" (9 3/4 inch) , '00-'07 (+5 more)

Pinion yokes

Part number	Description	2026 fitment
YY F880600	Round companion flange, 4.3" O.D.	29 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS Passenger Car 28 Spline; Ford 8.8" IRS SUV
YY F880601	1330 U/Joint	56 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
YY F880602	Round companion flange, 5" O.D.	49 vehicles — Ford 8.8" IRS SUV; Ford 8.8" - 28 Spline
YY F880622	1350 U/Joint, forged steel	66 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
YY F880631	Round companion flange, 2005 & up Mustang w/CV driveshaft	4 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" IRS Passenger Car 31 Spline

Shim kits

Part number	Description	2026 fitment
SK 25300	Pinion depth shim kit	569 vehicles — GM 8.6" Rear, '99-'08; Ford 7.5; GM 8.6" Rear, '09 & up (+27 more)
SK CSF8.8	Crush sleeve eliminator kit	138 vehicles — Ford 8.8" - 28 Spline; Ford 7.5; Ford 8.8" IRS SUV (+1 more)
SK SS12	Super carrier shim kit	284 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 12 Bolt Truck (+10 more)

Small parts

Part number	Description	2026 fitment
YB AX-009	IRS/IFS axle bearing	28 vehicles — Ford 8.8" IRS SUV; Ford 8.8" Reverse Front 28 Spline
YSPABS-026	ABS tone ring, 35 tooth, 2003 & up crown vic	1 vehicle — Ford 8.8" - 28 Spline
YSPABS-017	ABS tone ring, for carrier, 108 tooth	53 vehicles — Ford 8.8" - 28 Spline
YSPABS-018	ABS tone ring for axle, 50 tooth, 3.7"	1 vehicle — Ford 8.8" - 28 Spline
YSPABS-019	ABS tone ring for axle, 49 tooth, 4.5"	1 vehicle — Ford 8.8" - 28 Spline
YSPBF-007	Baffle, IFS front	5 vehicles — Ford 8.8" Reverse Front 28 Spline
YSPBF-023	Outer slinger, rear differential	152 vehicles — Ford 7.5; Ford 9" (9 inch) - 28 Spline; Ford 9" (9 inch) - 35 Spline (+5 more)
YSPBLT-024	Ring gear bolt	149 vehicles — Ford 8.8" - 28 Spline; Ford 7.5; Ford 8.8" IRS SUV (+2 more)
YSPBLT-038	Cross pin bolt	888 vehicles — GM 8.6" Rear, '99-'08; Chrysler 9.25" Rear, '00 & older; GM 12 Bolt Truck (+21 more)
YSPCC-010	C/Clip	402 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; GM 12 Bolt Passenger Car (+7 more)
YSPCS-002	Crush sleeve	391 vehicles — Ford 7.5; Ford 9" (9 inch) - 28 Spline; Ford 9.75" (9 3/4 inch) , '00-'07 (+13 more)
YSPPN-020	Pinion nut	233 vehicles — Ford 9" (9 inch) - 28 Spline; Ford 7.5; Ford 8 (+5 more)
YSPSR-019	IRS snap ring	Not in the Oct 2026 file
YSPSTUD-005	Axle stud	129 vehicles — Ford 7.5; Ford 9" (9 inch) - 28 Spline; Ford 9" (9 inch) - 35 Spline
YSPSPR-004	Trac Loc spring, 28 spline	30 vehicles — Ford 8.8" - 28 Spline
YSPSPR-005	Trac Loc spring, 31 spline	44 vehicles — Ford 8.8" - 31 Spline
YSPSPR-009	Dura Grip spring plate 200lb & 300lb design	Not in the Oct 2026 file
YSPSPR-010	Dura Grip spring, 300lb	Not in the Oct 2026 file
YSPSPR-011	Dura Grip spring, 200lb	Not in the Oct 2026 file
YSPSR-010	Stub axle snap ring clip	8 vehicles — Ford 8.8" Reverse Front 28 Spline; Ford 8.8" Reverse Front 31 spline
YSPTW-027	Pinion gear thrust washer, 0.750" I.D.	66 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
YSPTW-028	Side gear thrust washer, 0.750" cross pin design	66 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
YSPTW-029	Pinion gear thrust washer, 0.875" I.D.	78 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
YSPTW-030	Side gear thrust washer, 0.875" cross pin design	78 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
YSPXP-026	Cross pin shaft, 0.875" diameter	78 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline
YSPXP-027	Cross pin shaft	138 vehicles — Ford 9" (9 inch) - 28 Spline; Ford 8; AMC Model 20
YSPXP-057	Notched cross pin shaft	53 vehicles — Ford 8.8" - 28 Spline
YSPXP-059	Notched cross pin shaft	75 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline

Traction aids and spools

Part number	Description	2026 fitment
YDGF8.8-28-1	Dura Grip positraction, 28 spline	38 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" Reverse Front 28 Spline; Ford 8.8" IRS Passenger Car 28 Spline
YDGF8.8-31-1	Dura Grip positraction, 31 spline	94 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+3 more)
YC F318	Trac Loc positraction, loaded	77 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline
YP FSF8.8-31	Steel spool, 31 spline	Not in the Oct 2026 file
YP MINSF8.8-28	Mini spool, 28 spline	30 vehicles — Ford 8.8" - 28 Spline
YP MINSF8.8-31	Mini spool, 31 spline	49 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline
YGLF8.8-28	Grizzly Locker, 28 spline	40 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" Reverse Front 28 Spline; Ford 8.8" IRS Passenger Car 28 Spline
YGLF8.8-31	Grizzly Locker, 31 spline	59 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" Reverse Front 31 spline; Ford 8.8" IRS Passenger Car 31 Spline
YC F318-C	Trac Loc Positraction with carbon fiber clutches	80 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 31 Spline (+1 more)

Carrier cases

Part number	Description	2026 fitment
YC F8.8-DG-28	Dura Grip case, bare, 28 spline	30 vehicles — Ford 8.8" - 28 Spline
YC F8.8-DG-31	Dura Grip case, bare, 31 spline	77 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline
YC F3180-S	Standard loaded carrier case, 31 spline	73 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" IRS SUV; Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline
YC F880500	Standard case, 28 spline	40 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" Reverse Front 28 Spline; Ford 8.8" IRS Passenger Car 28 Spline
YC F880502	Standard case, 31 spline	82 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" IRS SUV; Ford 8.8" IRS Passenger Car 28 Spline (+1 more)

Covers and gaskets

Part number	Description	2026 fitment
YCGF8.8	Cover gasket	114 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" IRS SUV (+2 more)
YP C1-F8.8	Chrome cover	77 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline
YP C3-F8.8-B	Heavy-duty aluminum girdle cover	56 vehicles — Ford 8.8" - 28 Spline; Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline
YP C5-F8.8-P	Plastic Cover	Not in the Oct 2026 file
YP C5-F8.8-S	Steel Cover	98 vehicles — Ford 8.8" - 31 Spline; Ford 8.8" - 28 Spline; Ford 8.8" 2010-2014 Mustang & Straight Axles w/ 3.250" OD Pinion Brg. 31 spline

Seals

Part number	Description	2026 fitment
YMS3604	Pinion seal	134 vehicles — Ford 7.5; Ford 8.8" IRS SUV; Ford 9.75" (9 3/4 inch), '97-'98 (+1 more)
YMS8660S	Axle seal, 2.250" O.D.	202 vehicles — Ford 7.5; GM 7.5" Rear, '81 & older; GM 12 Bolt Passenger Car (+5 more)
YMS8835S	Axle seal, 2.530" O.D.	383 vehicles — Chrysler 9.25" Rear, '00 & older; Chrysler 8.25", '76-'96; GM 12 Bolt Truck (+7 more)
YMS99181	Pinion yoke redi sleeve	189 vehicles — Ford 7.5; Ford 9" (9 inch) - 28 Spline; Ford 8 (+2 more)
YMS710067	Axle seal, 2.985" O.D.	112 vehicles — Ford 9.75" (9 3/4 inch), '97-'98; Chrysler 9.25" Rear, '00 & older; Ford 9.75" (9 3/4 inch) , '00-'07 (+3 more)
YMSF1003	Stub axle seal, IRS, Passenger car	5 vehicles
YMSF1004	Stub axle seal, IFS front	4 vehicles — Ford 8.8" Reverse Front 28 Spline
YMSF1005	Stub axle seal, IRS SUV	22 vehicles — Ford 8.8" IRS SUV

GM

GM 8.5" — 1970–present passenger car, 1978–1999 1/2-ton truck

Ring gear 8.5". Ring-gear bolts (10) 7/16" × 20 LH. Cover bolts 10. Carrier break 2.56 / 2.73. Pinion shaft 1.625" / 30 spline.

11 of 12 ring-and-pinion numbers from this chapter are still in the Oct 2026 fitment file.

GM 8.5" / 8.6" parts Ring and pinion Install kits 8.5" vs 8.6" cover

Ring and pinion

Part number	Ratio	Notes	2026 fitment
YG GM8.5-273	2.73	—	176 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-308	3.08	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-323	3.23	—	176 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-342	3.42	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-373	3.73	—	194 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-390	3.90	—	176 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-411	4.11	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-456	4.56	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-488	4.88	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-513	5.13	—	177 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-538	5.38	—	176 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-557	5.57	—	Not in the Oct 2026 file

Not in the Oct 2026 fitment file: YG GM8.5-557.

Spider gear kits

Part number	Description	2026 fitment
YPKGM8.5-S-28	Standard spider gear kit, 28 spline	78 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 28 Spline
YPKGM8.5-S-30	Standard spider gear kit, 30 spline	76 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline
YPKGM8.5-P-28	Posi spider gear set, Fits Dura Grip & Eaton, 28 spline, clutches not included	79 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 28 Spline
YPKGM8.5-P-30	Posi spider gear set for Dura Grip and Eaton, 30 spline, clutches not included. The 2015 catalog line says 28 spline; the part number is the 30-spline set.	151 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 8.5" Rear - 28 Spline (+2 more)
YPKGM12-PC-14	14 plate carbon clutches, Fits Dura Grip & Eaton	381 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-18	18 plate steel clutches, Fits Dura Grip & Eaton	378 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-22	22 plate steel clutches, Fits Dura Grip & Eaton	Not in the Oct 2026 file
YPKGM12-PC-DG1	14 plate composite clutches, Fits Dura Grip & Eaton	378 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-SHIM	Posi shim kit, Fits Dura Grip & Eaton	374 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)

Overhaul and install kits

Part number	Description	2026 fitment
YK GM8.5	Rear Master Overhaul kit	87 vehicles — GM 8.5" Rear - 28 Spline
YK GM8.5-F	Front Master Overhaul kit	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
YK GM8.5-HD	Rear LM102911/49, heavy duty for large carrier bearing	87 vehicles — GM 8.5" Rear - 28 Spline
YK GM8.5-HD-F	Front, LM102911/49, heavy duty for large carrier bearing	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
BK GM8.5	Rear Bearing installation kit	87 vehicles — GM 8.5" Rear - 28 Spline
BK GM8.5-F	Front Bearing installation kit	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
BK GM8.5-HD	Rear LM102911/49, heavy duty for large carrier bearing	87 vehicles — GM 8.5" Rear - 28 Spline
BK GM8.5-HD-F	Front, LM102911/49, heavy duty for large carrier bearing	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
PK GM8.5	Rear Pinion Installation kit	87 vehicles — GM 8.5" Rear - 28 Spline
PK GM8.5-F	Front Pinion Installation kit	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
MK GM8.5	Rear Minimum Installation kit	87 vehicles — GM 8.5" Rear - 28 Spline
MK GM8.5-F	Front Minimum Installation kit	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
CK GM8.5	Carrier install kit	245 vehicles — GM 7.5" Rear, '81 & older; Ford 7.5; GM 8.2" Rear for Buick, Oldsmobile & Pontiac (+7 more)
CK GM8.5-HD	Carrier install kit, oversize journals	107 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline

Axle bearing and seal kits

Part number	Description	2026 fitment
AK 1563	Axle Bearing & Seal kit, 2.250" O.D.	216 vehicles — Ford 7.5; GM 7.5" Rear, '81 & older; GM 12 Bolt Passenger Car (+6 more)
AK 1559	Axle Bearing & Seal kit, 2.530" O.D.	407 vehicles — Chrysler 9.25" Rear, '00 & older; Chrysler 8.25", '76-'96; GM 12 Bolt Truck (+8 more)
AK C10	Axle Bearing & Seal kit, 2.800" O.D.	260 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 9.5" Rear, '97-'13, 14 bolt cover (+2 more)
AK F-G02	Axle Bearing & Seal kit, 1977-1991 Front 1/2 ton	11 vehicles — GM 8.5" Front - 28 Spline; Dana 44 Front, Standard Rotation
AK F-G06	Axle Brg & Seal kit, 1977-1993 Front 3/4 ton Front	11 vehicles — GM 8.5" Front - 28 Spline; Dana 44 Front, Standard Rotation
AK GMAV	Axle bearing & seal kit, 2.445" O.D.	4 vehicles — GM 7.5" & 7.6" Rear, '00 & up

Pinion yokes

Part number	Description	2026 fitment
YY GM12470387	Mechanics 3R, inside snap ring	152 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up
YY GM14018211	1310, straps, outside snap rings	Not in the Oct 2026 file
YY GM3988524	1310, outside snap rings	107 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline
YY GM15588336	Mechanics 3R, inside snap rings	74 vehicles — GM 9.25" IFS Front, '10 & down; GM 8.25" IFS Front, '99-'09; GM 8.25 IFS Front 2010 & Newer (+1 more)
YY GM8.5-1350-C	1350, cast, U-bolts	196 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '09 & up (+2 more)
YY GM8.5-1350-F	1350, forged, U-bolts	196 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '09 & up (+2 more)
YY STR-005	1310 U/Joint strap & bolt kit	83 vehicles — GM 12 Bolt Truck; GM 8.5" Front - 28 Spline; GM 12 Bolt Passenger Car (+1 more)
YY STR-008	Mechanics 3R strap & bolt kit	173 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 28 Spline; GM 7.5" & 7.6" Rear, '82-'99 - 28 Spline (+2 more)

Shim kits

Part number	Description	2026 fitment
SK 25300	Pinion depth shim kit	569 vehicles — GM 8.6" Rear, '99-'08; Ford 7.5; GM 8.6" Rear, '09 & up (+27 more)
SK SS10	Super-Shim kit for carrier	273 vehicles — GM 7.5" Rear, '81 & older; GM 8.2" Rear for Buick, Oldsmobile & Pontiac; Ford 7.5 (+9 more)
SK CSGM8.5	Solid spacer to replace crush sleeve	249 vehicles — GM 8.6" Rear, '99-'08; Chrysler 9.25" Rear, '00 & older; GM 8.6" Rear, '09 & up (+3 more)

Small parts

Part number	Description	2026 fitment
YP MINSXGM8.5	Chromoly cross pin shaft	107 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline
YSPABS-022	Reluctor ABS ring for 3.73 pinion	3 vehicles — GM 8.5" Rear - 28 Spline
YSPBLT-019	Ring gear bolt	481 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 8.0 (+14 more)
YSPBLT-038	Cross pin bolt	888 vehicles — GM 8.6" Rear, '99-'08; Chrysler 9.25" Rear, '00 & older; GM 12 Bolt Truck (+21 more)
YSPBLT-074	U/Joint strap bolt	328 vehicles — GM 7.5" Rear, '81 & older; GM 8.5" Front - 28 Spline; GM 10.5" 14 Bolt Truck, '88 & older (excluding '84-'85) (+7 more)
YSPBLT-075	Cover bolt	815 vehicles — Dana 44 Front, Standard Rotation; Dana 44 Rear; GM 12 Bolt Truck (+34 more)
YSPCC-010	C/Clip	402 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; GM 12 Bolt Passenger Car (+7 more)
YSPCG-003	Posi clutch guide	343 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Chrysler 9.25" Rear, '00 & older (+5 more)
YSPCS-014	Crush sleeve	204 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 8.5" Front - 28 Spline (+6 more)
YSPPN-018	Pinion nut	929 vehicles — GM 8.6" Rear, '99-'08; GM 9.5" Rear, '97-'13, 14 bolt cover; GM 8.6" Rear, '09 & up (+20 more)
YSPPN-033	Pinion nut washer	586 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 9.5" Rear, '97-'13, 14 bolt cover (+11 more)
YSPSP-001	Wheel hub spindle nut, w/o washer	64 vehicles — Dana 44 Front, Standard Rotation; Dana 30 Front, Standard Rotation
YSPSP-002	Spindle nut kit	15 vehicles — Dana 44 Front, Standard Rotation; Dana 30 Front, Standard Rotation
YSPSP-025	Spindle bearing & seal kit, w/ washer	Not in the Oct 2026 file
YSPSPR-009	Dura Grip spring plate 200lb & 300lb design	Not in the Oct 2026 file
YSPSPR-010	Dura Grip spring, 300lb	Not in the Oct 2026 file
YSPSPR-011	Dura Grip spring, 200lb	Not in the Oct 2026 file
YSPTW-047	Pinion gear thrust washer	196 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '09 & up (+2 more)
YSPTW-034	Side gear thrust washer	107 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline
YSPXP-056	Notched cross pin shaft	Not in the Oct 2026 file
YSPXP-033	Standard cross pin shaft	158 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 28 Spline; GM 8.25" IFS Front, '98 & older (+3 more)

Traction aids and spools

Part number	Description	2026 fitment
YDGGM8.5-3-28-1	Dura Grip posi, 28 spl, 2.73 & up	94 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 28 Spline
YDGGM8.5-3-30-1	Dura Grip posi, 30 spl, 2.73 & up	206 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YGLGM8.5-3-30-1	Grizzly Locker, 30 spl, 2.73 & up	Not in the Oct 2026 file
YP FSGM8.5-28	28 spline steel spool, 2.73 & up	Not in the Oct 2026 file
YP FSGM8.5-30	30 spline steel spool, 2.73 & up	107 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline
YP FSGM8.5-33	33 spline steel spool, 2.73 & up	Not in the Oct 2026 file
YP MINSGM8.5-28	28 spline mini spool	78 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 28 Spline
YP MINSGM8.5-30	30 spline mini spool	99 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline

Front axle U-joints

Part number	Description	2026 fitment
YP SJ-297X-203	Super Joint kit, 2 joints + full circle clips, grease & grease gun	131 vehicles — Dana 44 Front, Standard Rotation; GM 8.5" Front - 28 Spline; Dana 30 Front, Standard Rotation (+3 more)
YP SJ-297X-202	2 Super Joints w/Full circle clips. No grease or grease gun	131 vehicles — Dana 44 Front, Standard Rotation; GM 8.5" Front - 28 Spline; Dana 30 Front, Standard Rotation (+3 more)
YP SJ-297X-201	1 Super Joint, w/Full circle clips. No grease or grease gun	131 vehicles — Dana 44 Front, Standard Rotation; GM 8.5" Front - 28 Spline; Dana 30 Front, Standard Rotation (+3 more)

Carrier cases

Part number	Description	2026 fitment
YC G26010481	Standard case, bare, 2.73 & up	107 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline
YC G26010481-XHD	Standard case, bare, 2.73 & up w/oversize HD bearing journals	107 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline
YC GM8.5-DG-3	Dura Grip case, bare, 2.73 & up	196 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '09 & up (+2 more)

Covers and gaskets

Part number	Description	2026 fitment
YCGGM8.5	Rear cover gasket	172 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '09 & up
YCGGM8.5-F	Front cover gasket	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
YP C1-GM8.5-F	Chrome cover, front	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
YP C1-GM8.5-R	Chrome cover, rear	169 vehicles — GM 8.6" Rear, '99-'08; GM 8.2
YP C2-GM8.5-R	Polished aluminum cover, rear	194 vehicles — GM 8.6" Rear, '99-'08; GM 8.2
YP C2-GM8.5-F	Polished aluminum cover, front	27 vehicles — GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline
YP C3-GM8.5-R	HD aluminum cover, rear	171 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 8.2
YP C5-GM8.5	Steel Cover, rear	135 vehicles — GM 8.2; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up

Ball joints

Part number	Description	2026 fitment
YSPBJ-011	Ball joint kit	Not in the Oct 2026 file

Seals

Part number	Description	2026 fitment
YMS2043	Rear pinion seal	92 vehicles — GM 8.2" Rear for Buick, Oldsmobile & Pontiac; GM 8.5" Rear for Oldsmobile 442 & Cutlas, 28 spline; GM 8.5" Rear for Oldsmobile 442 & Cutlas, 31 spline (+2 more)
YMS4762N	Axle seal, 88 & up C10	172 vehicles — GM 8.6" Rear, '09 & up; GM 8.6" Rear, '99-'08; GM 8.0 (+1 more)
YMS471271	Wheel seal	72 vehicles — Dana 44 Front, Standard Rotation; GM 8.5" Front - 28 Spline
YMS4795V	Axle seal, Astro & Safari van	4 vehicles — GM 7.5" & 7.6" Rear, '00 & up
YMS99193	Redi sleeve for pinion yoke	219 vehicles — GM 9.5" Rear, '79-'97, 14 bolt cover; GM 9.5" Rear, '97-'13, 14 bolt cover; GM 8.2" Rear for Buick, Oldsmobile & Pontiac
YMS5131	Front inner axle seal	80 vehicles — Dana 44 Front, Standard Rotation; GM 8.5" Front - 28 Spline; Dana 44 Front, Reverse Rotation, Straight Axle
YMS710506	Pinion seal, late model w/Triple lip	69 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up
YMS8622	4WD front pinion seal	26 vehicles — GM 8.5" Front - 28 Spline
YMS8660S	Axle seal for 5707 or 1563 bearing	202 vehicles — Ford 7.5; GM 7.5" Rear, '81 & older; GM 12 Bolt Passenger Car (+5 more)
YMS8835S	Axle seal for 1559 or 6408 bearing	383 vehicles — Chrysler 9.25" Rear, '00 & older; Chrysler 8.25", '76-'96; GM 12 Bolt Truck (+7 more)
YMS99131	Pinion yoke redi sleeve	102 vehicles — Dana 44 Front, Standard Rotation; GM 8.5" Front - 28 Spline; GM 8.5" Front - 30 Spline

Spindles

Part number	Description	2026 fitment
YP SP706529	Spindle, 6 hole 1.625" & 2.0" brg journals	20 vehicles — Dana 44 Front, Standard Rotation; GM 8.5" Front - 28 Spline

Drive flanges

Part number	Description	2026 fitment
YHC50007	19 spline, Yukon engraved	51 vehicles — Dana 44 Front, Standard Rotation; Dana 44 Front, Reverse Rotation, Straight Axle
YHC50008	19 spline, non-engraved	51 vehicles — Dana 44 Front, Standard Rotation; Dana 44 Front, Reverse Rotation, Straight Axle
YHCDF-19-A	19 spline, single flange only	60 vehicles — Dana 44 Front, Standard Rotation; Dana 44 Front, Reverse Rotation, Straight Axle; Dana 44 IFS Front, '92 & older (+1 more)

GM 8.6" — 2000 and up 1/2-ton truck

Ring gear 8.6". Ring-gear bolts (10) 7/16" × 20 LH. Cover bolts 10. Carrier break 2.56 / 2.73. Pinion shaft 1.625" / 30 spline. The 2015 gear-set list on this page reuses the GM 8.5" part numbers.

11 of 12 ring-and-pinion numbers from this chapter are still in the Oct 2026 fitment file.

GM 8.5" / 8.6" parts Ring and pinion Install kits 8.5" vs 8.6" cover

Ring and pinion

Part number	Ratio	Notes	2026 fitment
YG GM8.5-273	2.73	—	176 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-308	3.08	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-323	3.23	—	176 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-342	3.42	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-373	3.73	—	194 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-390	3.90	—	176 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-411	4.11	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-456	4.56	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-488	4.88	—	179 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-513	5.13	—	177 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-538	5.38	—	176 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YG GM8.5-557	5.57	—	Not in the Oct 2026 file

Yukon’s 2015 catalog prints the GM 8.5" gear-set numbers on the 8.6" truck page. The Oct 2026 fitment file still assigns those same numbers to both 8.5" and 8.6" axles. Camaro 8.6" IRS gears use a different series (YG GM8.6-…IRS) and are not in this chapter.
Not in the Oct 2026 fitment file: YG GM8.5-557.

Spider gear kits

Part number	Description	2026 fitment
YPKGM8.6-S-30V3	Standard spider gear kit, 30 spline. The 2015 catalog lists this number twice, once as 2009-up and once as 2007-up.	81 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up
YPKGM12-PC-14	Dura Grip & Eaton posi clutch set 14 Carbon clutches	381 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-18	Dura Grip & Eaton posi clutch set 18 steel clutches	378 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-22	Dura Grip & Eaton posi clutch set 22 steel clutches	Not in the Oct 2026 file
YPKGM12-PC-DG1	Dura Grip & Eaton posi clutch set 14 composite clutches	378 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM12-PC-SHIM	Dura Grip & Eaton posi shim set	374 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Ford 8.8" - 31 Spline (+6 more)
YPKGM8.6-S-30V2	Standard spider gear set, 30 spline	81 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up

Overhaul and install kits

Part number	Description	2026 fitment
YK GM8.6-A	Master Overhaul kit, 1999-2008	51 vehicles — GM 8.6" Rear, '99-'08
YK GM8.6-B	Master Overhaul kit, 2009 & up	32 vehicles — GM 8.6" Rear, '09 & up
BK GM8.6	Bearing installation kit, 1999-2008	51 vehicles — GM 8.6" Rear, '99-'08
BK GM8.6-B	Bearing installation kit, 2009 & up	30 vehicles — GM 8.6" Rear, '09 & up
PK GM8.6	Pinion installation kit, 1999-2008	Not in the Oct 2026 file
PK GM8.6-B	Pinion installation kit, 2009 & up	30 vehicles — GM 8.6" Rear, '09 & up
MK GM8.6	Minimum installation kit	81 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up
CK GM8.6	Carrier installation kit	134 vehicles — GM 8.6" Rear, '99-'08; GM 12 Bolt Truck; GM 8.6" Rear, '09 & up (+1 more)

Axle bearing and seal kits

Part number	Description	2026 fitment
AK 1559	Axle bearing & seal kit, 2.530" O.D.	407 vehicles — Chrysler 9.25" Rear, '00 & older; Chrysler 8.25", '76-'96; GM 12 Bolt Truck (+8 more)
AK 1563	Axle bearing & seal kit, 2.250" O.D.	216 vehicles — Ford 7.5; GM 7.5" Rear, '81 & older; GM 12 Bolt Passenger Car (+6 more)
AK C10	Axle bearing & seal kit, 2.800" O.D.	260 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 9.5" Rear, '97-'13, 14 bolt cover (+2 more)

Pinion yokes

Part number	Description	2026 fitment
YY GM12470387	Mechanics 3R U/Jnt, triple lip seal design	152 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up

Shim kits

Part number	Description	2026 fitment
SK 25300	Pinion depth shim kit	569 vehicles — GM 8.6" Rear, '99-'08; Ford 7.5; GM 8.6" Rear, '09 & up (+27 more)
SK CSGM8.5	Crush sleeve eliminator kit	249 vehicles — GM 8.6" Rear, '99-'08; Chrysler 9.25" Rear, '00 & older; GM 8.6" Rear, '09 & up (+3 more)
SK SS12	Super carrier shim kit	284 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 12 Bolt Truck (+10 more)

Small parts

Part number	Description	2026 fitment
YSPABS-021	ABS tone ring	131 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 9.5" Rear, '97-'13, 14 bolt cover (+2 more)
YSPABS-022	Reluctor ABS ring for 3.73 pinion	3 vehicles — GM 8.5" Rear - 28 Spline
YSPBLT-019	Ring gear bolt	481 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 8.0 (+14 more)
YSPBLT-075	Cover bolt	815 vehicles — Dana 44 Front, Standard Rotation; Dana 44 Rear; GM 12 Bolt Truck (+34 more)
YSPCC-010	C/Clip	402 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; GM 12 Bolt Passenger Car (+7 more)
YSPCG-003	Posi clutch guide	343 vehicles — GM 12 Bolt Truck; GM 8.6" Rear, '99-'08; Chrysler 9.25" Rear, '00 & older (+5 more)
YSPCS-014	Crush sleeve	204 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 8.5" Front - 28 Spline (+6 more)
YSPPN-018	Pinion nut	929 vehicles — GM 8.6" Rear, '99-'08; GM 9.5" Rear, '97-'13, 14 bolt cover; GM 8.6" Rear, '09 & up (+20 more)
YSPPN-033	Pinion nut washer	586 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 9.5" Rear, '97-'13, 14 bolt cover (+11 more)
YSPSPR-009	Dura Grip spring plate	Not in the Oct 2026 file
YSPSPR-010	Dura Grip spring, 300lb	Not in the Oct 2026 file
YSPSPR-011	Dura Grip spring, 200lb	Not in the Oct 2026 file
YSPSTUD-015	Axle stud	Not in the Oct 2026 file
YSPTW-047	Pinion gear thrust washer	196 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '09 & up (+2 more)
YSPTW-048	Side gear thrust washer	81 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up

Traction aids and spools

Part number	Description	2026 fitment
YDGGM8.5-3-30-1	Dura Grip posi, 2.73 & up, 30 spline	206 vehicles — GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up (+2 more)
YGLGM8.5-3-30-1	Grizzly Locker, 30 spl, 2.73 & up	Not in the Oct 2026 file
YP FSGM8.5-30	Steel spool, 2.73 & up, 30 spline	107 vehicles — GM 8.5" Rear - 28 Spline; GM 8.5" Front - 30 Spline

Carrier cases

Part number	Description	2026 fitment
YC G26060748	Standard carrier, 2.76 & up, 1999-2000	Not in the Oct 2026 file
YC G40048044	Standard loaded carrier, 2.76 & up	81 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up
YC GM8.5-DG-3	Dura Grip case, 2.73 & up, bare	196 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '09 & up (+2 more)

Covers and gaskets

Part number	Description	2026 fitment
YCGGM8.5	Cover gasket	172 vehicles — GM 8.6" Rear, '99-'08; GM 8.5" Rear - 28 Spline; GM 8.6" Rear, '09 & up
YP C1-GM8.5-R	Chrome cover	169 vehicles — GM 8.6" Rear, '99-'08; GM 8.2
YP C2-GM8.5-R	Polished aluminum cover	194 vehicles — GM 8.6" Rear, '99-'08; GM 8.2
YP C3-GM8.5-R	Heavy-duty aluminum girdle cover	171 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up; GM 8.2
YP C5-GM8.5	Steel Cover	135 vehicles — GM 8.2; GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up

Seals

Part number	Description	2026 fitment
YMS4762N	Axle seal, 2.800" O.D.	172 vehicles — GM 8.6" Rear, '09 & up; GM 8.6" Rear, '99-'08; GM 8.0 (+1 more)
YMS710506	Pinion seal, triple lip design	69 vehicles — GM 8.6" Rear, '99-'08; GM 8.6" Rear, '09 & up
YMS8660S	Axle seal, 2.250" O.D.	202 vehicles — Ford 7.5; GM 7.5" Rear, '81 & older; GM 12 Bolt Passenger Car (+5 more)
YMS8835S	Axle seal, 2.530" O.D.	383 vehicles — Chrysler 9.25" Rear, '00 & older; Chrysler 8.25", '76-'96; GM 12 Bolt Truck (+7 more)

Specifications and part numbers follow Yukon Gear & Axle’s 2015 catalog: Ford 8.8" on catalog pages 61–62, GM 8.5" on pages 73–74, and GM 8.6" on page 75. Vehicle counts are from the Randy’s Worldwide fitment extract dated 10 October 2026. This page is a lookup table for parts DiffGears sells. It is not Yukon’s catalog, and it is not a substitute for identifying the axle on the vehicle.