AMC 20 4.11 Ring and Pinion Gears

The 4.11 ratio stands out as one of the most sought-after aftermarket upgrades for the AMC 20 rear axle in 1976-1986 Jeep CJ5, CJ7, CJ8, and similar models, providing substantial low-end torque, quicker acceleration, and superior off-road crawl capability compared to milder stock or factory ratios like 2.73, 3.07, 3.31, or 3.54—making it ideal for 31-33" tires on moderate builds or 33-35" tires on more aggressive setups while keeping highway RPMs reasonable (often 2500-3000 RPM at 65-70 mph depending on transmission, overdrive, and exact tire diameter). It requires the 3.07-up carrier (per AMC 20 carrier breaks) and is frequently selected for regearing after tire upsizing to restore lost power, improve trail performance in rocks, mud, or steep climbs, enhance towing, or achieve a versatile daily/trail balance—especially popular with T5 transmissions or manual setups for better overall drivability. Browse a wide variety of AMC 20 ring and pinion gears in 4.11 ratio from trusted brands including Revolution Gear (M20-410), Motive Gear (AM20-410), Yukon Gear, Alloy USA, Crown Automotive, and others to pair with installation kits, precision bearings, heavy-duty shafts, and traction devices for a complete, reliable regear that maximizes torque delivery and off-road confidence.