SW86 Posted November 12, 2010 Share Posted November 12, 2010 looking for another dana 30 to do a direct swap with. is there any certian year Xj i have to go for or could i just find one, pop it out, then pop in my MJ. any other tips would be apperciated. thanks Link to comment Share on other sites More sharing options...
Pete M Posted November 12, 2010 Share Posted November 12, 2010 the axles themselves are directly interchangeable, but there were some subtle brake changes over the years. what specifically are you looking for? Link to comment Share on other sites More sharing options...
87Warrior Posted November 12, 2010 Share Posted November 12, 2010 It would also be wise to get one with a matching gear ratio. :idea: Link to comment Share on other sites More sharing options...
88pioneer Posted November 12, 2010 Share Posted November 12, 2010 I would personally go with a newer XJ dana 30. Bigger, stronger u joints. Brakes are a little different, but thats an easy fix Link to comment Share on other sites More sharing options...
SW86 Posted November 12, 2010 Author Share Posted November 12, 2010 pretty much just looking for one i could build up or one i could just swap in with new, bigger, better parts. plus i just flat out think something is up with mine. can't put my finger on what though. gear ratio was one of the first things i thought about getting right. don't i just count the teeth on the ring? Link to comment Share on other sites More sharing options...
Garvin Posted November 12, 2010 Share Posted November 12, 2010 If you're swapping it into the rig in your Jeep and it's a stock axle in yours now, then you have 3.55 gears. You will need to find one from another 4.0L with an auto transmission for the same 3.55 gears. Pretty much any year Dana 30 out of an XJ or MJ will fit. You will want 91+ without the CAD but 99- which are HP. The ideal axle would be out of a '97-'99 since that has the larger u-joints. If you still have the CAD setup and use it, you will need to get one out of an 84-90 (some 91 and 92's came with CAD also). Link to comment Share on other sites More sharing options...
SW86 Posted November 13, 2010 Author Share Posted November 13, 2010 well ive always thought about doing the bypass on the CAD so I'm not worried about that. just any one 97-99 got cha. how many teeth will there be on 3.55 gears? hell if i find 4.10s in there instead, i might just pull the rear end too. which should be a 8.25 if I'm lucky. Link to comment Share on other sites More sharing options...
88pioneer Posted November 13, 2010 Share Posted November 13, 2010 If the tag is still on the front axle, then it should have the gear ratio stamped on it. Also, an auto 4.0 XJ was 3.55 geared, so finding one should be very easy. :thumbsup: Link to comment Share on other sites More sharing options...
mvusse Posted November 13, 2010 Share Posted November 13, 2010 The number of teeth on both the ring and pinion gears are stamped into the outside edge of the ring gear. Link to comment Share on other sites More sharing options...
SW86 Posted November 13, 2010 Author Share Posted November 13, 2010 good deal! thanks guys now i just have to find one Link to comment Share on other sites More sharing options...
mnkyboy Posted November 13, 2010 Share Posted November 13, 2010 Any xj with a 242 TC is gonna have a non cad axle regardless of year,also any xj with ABS brakes should have the bigger u joints.. I pulled mine from a 94 w/ABS so its a non cad hp30 with big u jounts,but then my 90 xj came stock with a non cad hp 30 with big u joints. So if you know what your looking for you can widen you search to 89or90-99,I would imagine the earlier axles will be easier to find the a 97-99 Link to comment Share on other sites More sharing options...
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