mvusse Posted July 27, 2013 Share Posted July 27, 2013 Why do you have to drop the crossmember? Link to comment Share on other sites More sharing options...
desertmike Posted July 27, 2013 Share Posted July 27, 2013 I didn't drop the crossmember on mine. I think the MJ short or long bed is long enough so you don't have to lower the TC or use a SYE. The AX15 I got was from a 97 TJ. I had to redrill the holes in the back of the AX15 to make the TC work right. Link to comment Share on other sites More sharing options...
mvusse Posted July 27, 2013 Share Posted July 27, 2013 Dropping the cross member puts a lot of strain on the engine mounts, making them wear out faster and messes up the rear driveshaft angles. You now need to turn up the pinion to get them aligned again. The only thing it fixes is the front driveshaft if you're using a Wrangler transmission and don't want to clearance the truck floor for the double cardan joint. Even on shorter vehicles with a lot of lift, it should only be a temporary solution until a permanent fix like a SYE can be installed. Link to comment Share on other sites More sharing options...
chappy88 Posted July 27, 2013 Author Share Posted July 27, 2013 I have already put the 91 Cherokee 4x4 drive train in the 88MJ and added 4.5 rough Country kit without 2 many hassles. The kit came with the spacers to drop the cross member 1.5" ....and the installation manual backs it up. You guys are talking Wanglers and Newer model TJ's . Are you guys speaking from experience with XJ's and MJ's? Link to comment Share on other sites More sharing options...
mvusse Posted July 27, 2013 Share Posted July 27, 2013 I ran 8" rear lift on my MJ without a transfer case drop and never had a problem. Our driveshafts are long enough that it's simply not needed. And it makes the front driveshaft angle worse. Link to comment Share on other sites More sharing options...
chappy88 Posted July 27, 2013 Author Share Posted July 27, 2013 since my mj was 2wd, I'll have to get the shaft shortened, any problems with that? Link to comment Share on other sites More sharing options...
HOrnbrod Posted July 27, 2013 Share Posted July 27, 2013 You shouldn't, as long as you measure it right and get it balanced. Might as well replace the u-joints too since their operating angles will be changed due to the lift. Sometimes they don't like that and driveline vibes can occur. Link to comment Share on other sites More sharing options...
chappy88 Posted July 28, 2013 Author Share Posted July 28, 2013 Any idea on adding a skid plate? since you guys talked me out of dropping the cross member, I'm again looking for some good info :laughin: Link to comment Share on other sites More sharing options...
Zebvance Posted July 28, 2013 Share Posted July 28, 2013 I have 8 inches of lift in the rear of mine right now and had to get a sye because of bad vibs. And had a 1 inch transfer case drop. Link to comment Share on other sites More sharing options...
mvusse Posted July 28, 2013 Share Posted July 28, 2013 I have 8 inches of lift in the rear of mine right now and had to get a sye because of bad vibs. And had a 1 inch transfer case drop. The transfer case drop might have actually been the problem. http://www.4x4wire.com/tech/pinionangle/ Link to comment Share on other sites More sharing options...
Eagle Posted July 28, 2013 Share Posted July 28, 2013 I have already put the 91 Cherokee 4x4 drive train in the 88MJ and added 4.5 rough Country kit without 2 many hassles. The kit came with the spacers to drop the cross member 1.5" ....and the installation manual backs it up. You guys are talking Wanglers and Newer model TJ's . Are you guys speaking from experience with XJ's and MJ's? XJs and MJs are what we do here. DO NOT drop your cross member in an MJ. Link to comment Share on other sites More sharing options...
mvusse Posted July 29, 2013 Share Posted July 29, 2013 Don't believe ANYTHING Rough Country says. They do not have a very good reputation when it comes to quality. If they can't make the parts right, what makes you think they can engineer a lift kit right? There are differences between XJs and MJs that matter. A lot of lift kit manufacturers either don't realize this, or just don't care. Link to comment Share on other sites More sharing options...
chappy88 Posted July 30, 2013 Author Share Posted July 30, 2013 OK! I'm convinced, no drop.....still doesn't line up with frame holes, have a fab guy going to make adapter. thz guys Link to comment Share on other sites More sharing options...
Zebvance Posted July 30, 2013 Share Posted July 30, 2013 How much is he going to charge you? I might be intrested in the adapter plates if he is willing to make two sets Link to comment Share on other sites More sharing options...
Geonovast Posted July 30, 2013 Share Posted July 30, 2013 I'm really not understanding this problem with the crossmember not lining up, and it's not the first time I've seen it. XJ/MJ crossmembers are the same. They have the same mounting holes. The transmissions are the same, and the mounts are the same. If nothing's lining up, then you're either missing something, or have something on incorrectly. Do you have that stupid little zig zag plate that goes between the mount and the trans? Are you sure it's not a YJ mount? Can we please get some pics of it not lining up/the setup? Link to comment Share on other sites More sharing options...
chappy88 Posted July 31, 2013 Author Share Posted July 31, 2013 I don't have much luck getting pics on this site! I can try again. Link to comment Share on other sites More sharing options...
HOrnbrod Posted July 31, 2013 Share Posted July 31, 2013 I'm really not understanding this problem with the crossmember not lining up, and it's not the first time I've seen it. XJ/MJ crossmembers are the same. They have the same mounting holes. The transmissions are the same, and the mounts are the same. If nothing's lining up, then you're either missing something, or have something on incorrectly. Do you have that stupid little zig zag plate that goes between the mount and the trans? Are you sure it's not a YJ mount? Can we please get some pics of it not lining up/the setup? Yeah, I'm not understanding this either. Something's incorrect or the frame is twisted. Everything should line up using the correct cross-member mounting hole set and tranny adapter. Link to comment Share on other sites More sharing options...
Zebvance Posted July 31, 2013 Share Posted July 31, 2013 Man I wish I took Pictures when I ran into the problem. Like I said I just oblonged the Holes on the Trans mount to make it work. Link to comment Share on other sites More sharing options...
chappy88 Posted August 1, 2013 Author Share Posted August 1, 2013 Well I bought this truck new and the frame is as it was new. Gotta get some pics. Link to comment Share on other sites More sharing options...
knkn9 Posted November 2, 2015 Share Posted November 2, 2015 I found this: http://naxja.org/forum/showthread.php?t=1123213&page=3 Image Not Found Image Not Found Link to comment Share on other sites More sharing options...
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