Drivetrain

[CRM1988]

What transmission and rear end did they put in the 1990 Pioneer with the 4.0 and 5 speed. :???:

[jimoshel]

If it was standard issue, the tranny was a AISIN 5spd and the rear end was a Dana 35.However on special order the Dana 44 could be under it.

[Geonovast]

Your 5 speed will be an Aisin AX-15. Rear axle will be a Dana 35 as mentioned, although it could be a Dana 44, which was most commonly associated with the Metric Tonne package.

[Burls]

gear ratio is more than likely 3.07