The Advance Adapters Atlas Transfer Case is the gold standard in gear-driven off-road transfer cases — built in the USA and trusted by rock crawlers, Ultra4 racers, and serious trail rigs worldwide. Unlike chain-driven OEM transfer cases, the Atlas uses helical-cut gears throughout for quiet operation, superior strength, and long-term durability under extreme use.

The Atlas collection at Skinny Pedal Racing covers both Atlas 2-Speed and Atlas 4-Speed transfer cases in Trail Series and G2/G3 Pro Rated configurations, available in multiple low range ratio options including 1.5:1, 2.0:1, 3.0:1, 3.8:1, 4.3:1, and 5.0:1. The 4-Speed unit adds a Borg Warner synchronized planetary reduction housing to the front of the standard Atlas case for additional low gear options without sacrificing any of the Atlas's core features.

Adapter kits are available for virtually every major transmission including the GM TH350, TH400, 700R4/4L60E, 4L80E, 6L80, 6L90, GM Powerglide, Ford C4, Ford 6R140 in 4x2 and 4x4 configurations, Toyota Tacoma and FJ Cruiser manual and automatic transmissions, and the Jeep AX15. Input shaft options cover 21, 23, 27, 29, 31, 32, 34, and 35 spline configurations to match virtually any drivetrain combination.

Rebuild and service parts include the AB1000 complete 32-spline rebuild kit with Timken bearings, AB1001 rebuild kit with new front output shaft, racer repair kits for both early and late serial number cases, front input seal kits in both large and small seal versions, input shafts, yokes in 1350 non-CV and CV configurations, cable shifter kits for Jeep TJ in both manual and automatic transmission applications, spacer and rotation rings, and Toyota Tx2 dual bearing crawler kits in both 21-spline and 23-spline versions. Also available is the Advance Adapters Toyota Crawler to Dana 300 adapter kit and GM 4L80E to NP205 transfer case adapter.