Jeep Wrangler Drivetrain
Engine: AMC 150 (2.5L), AMC 258 (4.2L), 242 (4.0L).
Transmission: Peugeot BA 10/5, Aisin Warner AX-5, Aisin Warner AX-15, Aisin-Warner AW30-40.
Transfer Case: New Process 207, New Process 231
Axles: Dana 30, Dana 35
Ring and Pinion Ratios: 3.07, 4.10
Engines
2.5L, 4.2L, and 4.0L factory engines.
Transmissions
AX-5, BA-10, AX-15, AW30-40.
Transfer Cases
NP207 & NP231 identification and ratios.
Axles
Dana 30 front, Dana 35 rear.
For highway RPM estimates after a tire size change, see the Gear Ratio Guide.