View Full Version : transmission

Explorer guy418
02-05-2006, 06:13 PM
did they ever put a auto tranny in the 87 yj's with the 4.2

02-05-2006, 07:04 PM
yes they did use an auto behind the 4.2 in the cjs and yjs the cj is a dodge 904 3spd auto with jeep bellhousing with a dana 300. The yjs are a 999 3 spd auto ( updated version of 904) with a np231 but if I remember right the tcase for that is auto only ( has a longer input spline ) and I am not sure if the cj one will swap have never tried that one.

02-05-2006, 07:05 PM
i hurd they did from a buddy of mine ...but im not quite sure where to find one sry bro

Explorer guy418
02-05-2006, 07:53 PM
crap, i really wanna do this swap.

Jeep eh
02-05-2006, 09:08 PM
crap, i really wanna do this swap.
ive got a 3 speed torque converter tranny in my 1990 yj that came stock with a np231. its geared pretty low definatly not built for highway crusing. just curious why u want to swap to an auto cuz i was thinkin i wanted to swap to a 5 speed to tell u the truth.

Explorer guy418
02-05-2006, 11:23 PM
ur jeep is auto, is it the 4.2? maybe we can work something out, my tranny is pretty good in my jeep, let me know eh?

Jeep eh
02-06-2006, 05:54 PM
ya mines a 4.2 but i dont know if im up for taking my tranny out again i had it out a month ago to rebuild it but il think about it