Jeep Sarge Posted January 26, 2010 Share Posted January 26, 2010 I Bought me a little 2wd Commanche as a project and i got everything running good and cleaned up and i went for a little afternoon drive and i have a terrible Vibration whenever i lift my foot off the Gas pedal at speeds over 25-30. Well I am thinking that i have got some issues in the rearend, i had previously changed out the rear diff fluid and hadn't seen any signs of wear, so i am thinking that it is some backlash or something, as soon as i get back on the gas goes right away. Well with all that being said i am new to the MJ/XJ world and i got a buddy that has a Dana 35 out of a 1993YJ and was wondering if it would bolt right in or do i need to stick with a MJ/XJ rear? Thanks in advance, JEEP SARGE Quote Link to comment Share on other sites More sharing options...
Wildman Posted January 26, 2010 Share Posted January 26, 2010 Did you check the U-joints??? That is normal check, when you hit about 30 mph and let off the gas, the U-joint will give you a clunk or really bad vibration. Quote Link to comment Share on other sites More sharing options...
Jeep Sarge Posted January 26, 2010 Author Share Posted January 26, 2010 I looked at them and didn't really feel any play in them, but i guess that i can throw some new ones in there just to rule it out, i was gonna put new ones in there anyway when i swapped Diffs :cheers: Quote Link to comment Share on other sites More sharing options...
mvusse Posted January 26, 2010 Share Posted January 26, 2010 It does sound like a u joint. Remove the drive shaft and play with the u joints to make sure all 4 caps rotate smoothly. I'm willing to bet one of them is bad. And I'm guessing it's the rear one. Quote Link to comment Share on other sites More sharing options...
Jeep Sarge Posted January 26, 2010 Author Share Posted January 26, 2010 I'll try it and See, hope that your right :doh: Quote Link to comment Share on other sites More sharing options...
Jeep Sarge Posted January 27, 2010 Author Share Posted January 27, 2010 U-Joints Dry as a Bone, we'll see tomorrow when i go out for a ride Quote Link to comment Share on other sites More sharing options...
Squeegy410 Posted January 27, 2010 Share Posted January 27, 2010 to answer the intial question I would think the D35 would bolt right up. I think (correct me if i'm wrong, i'm new to this too) all MJ's came with either a D35 or D44. Quote Link to comment Share on other sites More sharing options...
mvusse Posted January 27, 2010 Share Posted January 27, 2010 But are YJ springs spaced the same distance apart as MJ springs? The perches on a YJ D35 might not be in the correct location. Quote Link to comment Share on other sites More sharing options...
Squeegy410 Posted January 27, 2010 Share Posted January 27, 2010 oh I didn't even think about that. I doubt it will just bolt right up come to think of it. I know most things xj related match in the front of an mj but not the back. It's probobly the same for the tj. But i do have a very limited knowledge so far lol. I'm learning :D Quote Link to comment Share on other sites More sharing options...
jimoshel Posted January 27, 2010 Share Posted January 27, 2010 MJ'S came with D30 and D35. Only the metric ton package or special order got thr D44. The yJ spring perches are 1-1/2 inches farther apart than MJ. Quote Link to comment Share on other sites More sharing options...
Squeegy410 Posted January 27, 2010 Share Posted January 27, 2010 gotchya. I'll make a note of that so maybe i can actually be helpfull for a change one day lol Quote Link to comment Share on other sites More sharing options...
Jeep Sarge Posted January 27, 2010 Author Share Posted January 27, 2010 MJ'S came with D30 and D35. Only the metric ton package or special order got thr D44. The yJ spring perches are 1-1/2 inches farther apart than MJ. Thanks that is what i was needing to know, Let me see how replacing my u-joints works out this evening Quote Link to comment Share on other sites More sharing options...
jpnjim Posted January 27, 2010 Share Posted January 27, 2010 Don't forget the 3rd MJ rear axle (before they started spec'ing D44's). :yes: '86 4.10 geared 1 piece axleshaft AMC Model 20's. :smart: Quote Link to comment Share on other sites More sharing options...
DJM/78 Posted January 27, 2010 Share Posted January 27, 2010 IMHO , after all the work putting a new or used diff , in place , I would find a ford 8.8 or a dana 44 . Both are good axles and very upgradable . Disc brakes and lots of options on lockers . :cheers: Quote Link to comment Share on other sites More sharing options...
Squeegy410 Posted January 27, 2010 Share Posted January 27, 2010 IMHO , after all the work putting a new or used diff , in place , I would find a ford 8.8 or a dana 44 . Both are goodaxles and very upgradable . Disc brakes and lots of options on lockers . :cheers: Do you mean disk brakes are an option? because my D44 rear axle has drum brakes... Quote Link to comment Share on other sites More sharing options...
Pete M Posted January 27, 2010 Share Posted January 27, 2010 later years of the Explorer 8.8 has disk brakes, and the Jeep Dana 44 can be upgraded to disks fairly easily. Quote Link to comment Share on other sites More sharing options...
Jeep Sarge Posted January 28, 2010 Author Share Posted January 28, 2010 U-Joints fixed it right up, it is usually the simple stuff, Thanks Guys Quote Link to comment Share on other sites More sharing options...
Wildman Posted January 28, 2010 Share Posted January 28, 2010 Yep........another K.I.S.S. project :cheers: Quote Link to comment Share on other sites More sharing options...
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