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  • tranny/tcase ?

    I have a 6cyl yj auto tranny
    What transfer case would be in this jeep?
    And are the auto trannys the same for the 6cyl and the 4cyl?


  • #2
    You did not list your year so I will break it down like this:

    If you have an early 1987 then you could have an NP 207 but anything after a few months in early 87 would be a NP 231 clear to the end in 95. If you look on the round tag on the rear of your transfer case it will tell you. It's there you may have to wipe it off.

    As for Auto trans. 87 to 90 6cyl Auto would be a Chrysler 999

    The TF904 was in the I4 (only in 1994, 1995 and TJ of course) and the TF999 was in the I6 starting in 91

    So no, they are not the same between 4 and 6 cyl.

    1. Bellhousings are completely different
    2. 4cyl trans have a 21 spline output shaft that goes to the transfer case.
    6 cyl are 23 (except those that are equipped with a 87-89 maual trans Puegeot these are also 21 spline)
    Last edited by mlyle88yj; 01-26-2010, 10:08 PM.


    • #3

      The jeep is an 1995