ryno56 Posted November 12, 2010 Share Posted November 12, 2010 I was going to post this in the driveshaft length thread but that's all about stock trucks... So, I've swapped an AX-15/NP231 and Chry 8.25 from a '98 XJ into my '90 MJ SWB and after reading the driveshaft length thread I decided I should need a 42.25" ds. Easy enough.... Learning as I have to always double check, I measured the eye to eye under my truck with the slip yoke in the original position and the truck on its wheels. I come up with ~40" :huh???: . That's not even close! I'm having it made to that length 'cuz that's what's gonna fit, 42.25" would definitely bottom out on the TC before getting the U-joint in place. Did the change from the external to internal seal on the NP231 change this or is there something else I'm missing? Link to comment Share on other sites More sharing options...
ryno56 Posted November 13, 2010 Author Share Posted November 13, 2010 any one else ever seen this issue? I couldn't find any info on XJ ds lengths to cross reference. Link to comment Share on other sites More sharing options...
Pete M Posted November 13, 2010 Share Posted November 13, 2010 XJ driveshafts will be about 12" shorter than an shortbed MJ with the same drivetrain. and I don't have any numbers on it, but it very well could be the sealed t-case that's causing the discrepancy. Link to comment Share on other sites More sharing options...
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