TheDirtyJeep401 Posted May 12, 2013 Share Posted May 12, 2013 My dad is getting an Mj and it is an 87 2.5 4x4 short bed with an ax4, he is wanting to cinvert it to an auto tranny rather than the ax4. Does anyone know what transmissions will bolt up the the 2.5 and still be 4x4? Link to comment Share on other sites More sharing options...
dasbulliwagen Posted May 12, 2013 Share Posted May 12, 2013 The A904 trans and NP207 or NP228 transfer cases from 84-86 XJ's and Mj's with 2.8's will bolt in and not have any electronic controls. The A904 can be a good trans if properly rebuilt. There are a couple of upgrades that can be done to them to increase reliablity and shifting feel. It is a light duty version of the TF 727 from Chrysler and the A904 was offered behind Chrysler 6's and small V8's as well. The biggest issue would be getting the crank sensor to work with it. I'm not sure what autos were available behind the 2.5 's. I asked that same question in another thread with no response. Link to comment Share on other sites More sharing options...
Minuit Posted May 13, 2013 Share Posted May 13, 2013 Some (very very few) 2.5s had the AW4 behind them, which is probably the most reliable transmission ever offered in the Jeep lineup, but most automatic 2.5s had the A904. Be warned, an automatic 2.5 truck will be an absolute dog no matter what. If you're converting to an auto, look for an AW4. Not sure on the bell housing you need though. Link to comment Share on other sites More sharing options...
tleed Posted May 13, 2013 Share Posted May 13, 2013 Comanche fan: My '86 truck originally had a 2.8 that died spectacularly years ago. The auto tranny is attached to the NP207 in the bed of the truck. Send me your clutch parts (pedals & stuff) & I'll pack this tranny & 207 in an envelope & send them to you… Where are you anyway? Link to comment Share on other sites More sharing options...
TheDirtyJeep401 Posted May 13, 2013 Author Share Posted May 13, 2013 Will the tranny from a 2.8 bolt up to a 2.5? Link to comment Share on other sites More sharing options...
dasbulliwagen Posted May 13, 2013 Share Posted May 13, 2013 It will bolt up, just not sure if there is a place for the 2.5's crank sensor. That is the question! Link to comment Share on other sites More sharing options...
TheDirtyJeep401 Posted May 14, 2013 Author Share Posted May 14, 2013 Hmmmm I'm gonna have to look into that Link to comment Share on other sites More sharing options...
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