AMC and Jeep transmissions
Vehicles made by American Motors Corporation (AMC) and Jeep incorporated a variety of transmissions and transfer case systems. This article covers transmissions used in the following vehicle models and years: All American Motors (AMC) passenger cars, 1954-1988 Jeep Cherokee XJ (1984–2001) Jeep Comanche (1985-1992) Jeep CJ (1976–1986) Jeep Grand Cherokee WJ (1999–2004) Jeep Grand Cherokee ZJ (1993–1998) Jeep Wagoneer/Grand Wagoneer (1963–1991) Jeep Wrangler YJ (1987–1995) Transmissions Transmissions used in later AMC vehicles came with either a 21-spline or a 23-spline output shaft. Transmissions coupled to four-cylinder engines typically used 21-spline output shafts. The 23-spline manual transmission was universal in the Eagle lines and was generally used with six-cylinder applications. All transfer cases were available with inputs matching either 21- or 23-spline shafts, making transmission swaps possible among various models and years. However, the depth of transfercase input and length of trans output (measured from the mounting flange) changed, and there is 15/16" difference between early and late models. Manual The following manual transmissions have been used in the vehicles listed above: Aisin AX4 four-speed (used with 4 cyl and 2.8 L V6) Aisin AX5 five-speed (used with 4 cyl and 2.8 L V6) Aisin AX15 five-speed (used with 4.0 L