Red 1989 MJ Posted October 21, 2009 Share Posted October 21, 2009 I just bought a 1990 4.0l MJ auto. 4x4 long bed for parts. I want to swap the D44 to my truck. My truck is a MJ 1989 4.0l AX-15, short bed. Could somebody tell me if auto and manual have different differentiel gear ratio? Quote Link to comment Share on other sites More sharing options...
Pete M Posted October 21, 2009 Share Posted October 21, 2009 the 4.0 rules of thumb: 4.0 + auto = 3.55 4.0 + stick = 3.07 Quote Link to comment Share on other sites More sharing options...
Red 1989 MJ Posted October 21, 2009 Author Share Posted October 21, 2009 Any suggestion where to buy the right gearing ? Quote Link to comment Share on other sites More sharing options...
Pete M Posted October 21, 2009 Share Posted October 21, 2009 what do you mean? Quote Link to comment Share on other sites More sharing options...
Red 1989 MJ Posted October 21, 2009 Author Share Posted October 21, 2009 Because my truck is a 4x4. Front gearing = Rear gearing. Should I have to swap both axles ? Quote Link to comment Share on other sites More sharing options...
Pete M Posted October 21, 2009 Share Posted October 21, 2009 yes, you'll need to swap both axles. Quote Link to comment Share on other sites More sharing options...
Red 1989 MJ Posted October 21, 2009 Author Share Posted October 21, 2009 Can I use my actual Drive Shaft ? Quote Link to comment Share on other sites More sharing options...
Pete M Posted October 21, 2009 Share Posted October 21, 2009 any lift? Quote Link to comment Share on other sites More sharing options...
Red 1989 MJ Posted October 21, 2009 Author Share Posted October 21, 2009 No lift, my truck is Stock. Maybe 3"lift in the futur. Quote Link to comment Share on other sites More sharing options...
Pete M Posted October 21, 2009 Share Posted October 21, 2009 If you wait til the lift, it'll be perfect. Might be pretty tight since the 44 has a 1" longer snout on it. Quote Link to comment Share on other sites More sharing options...
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