CWLONGSHOT Posted May 11, 2006 Share Posted May 11, 2006 This one has plagued me for about three weeks now.the noise occurs upon accelloration and when hitting a med sized bump in the road. To my ear, it sounds like its coming from the pass front tar area. but at times I can also "feel" it in the center near the T-case. I thought for sure it was motor mounts as the noise occurs upon med/hard acceloration. Motor mounts proved FINE!! I found the intermeadiate pipe loose where it exits the manafold. That WAS a noise, just not the one in question. I also found a slightly loose lower track bar bolt. This may or may not have been a sorce of a noise, but I tightened it anyhow. :) I have also removed the rear drive shaft and checked the universals as I have recently lifted this truck. They are fine. I re-greased them and reinstalled. I DID find some unwanted movement in the T-case output. I changed the fluid and found some metal particles suspended in the fluid. I also pulled the tranny dipstick. the fluid is a bit darker than new and has a touch of a burned smell, not strong smell, but not nice and clean as I'd like it. With the unit body, pinpointing the location of noises is near impossible!! HELP!! Got any ideas?? I have NOT checked the tranny mount...I am planning on swappin in another 231 T-case and rebuilding the one in there now anyhow.....Doing the swap this Sat...... CW Link to comment Share on other sites More sharing options...
Pete M Posted May 12, 2006 Share Posted May 12, 2006 I had a "bump" when my exhaust was loose and hitting the transmission crossmember. Link to comment Share on other sites More sharing options...
87manche Posted May 12, 2006 Share Posted May 12, 2006 front sway bar bushing maybe, if you've still got one of those. Link to comment Share on other sites More sharing options...
juan Posted May 12, 2006 Share Posted May 12, 2006 swapping T-case huh? where? I did not know you had a spare on waiting to go in... check the control arms, mine gets lose every now and then (pass.side only) and it clunks on me. Link to comment Share on other sites More sharing options...
Eagle Posted May 12, 2006 Share Posted May 12, 2006 When I first bought the '87 MJ I was getting a severe CLUNK from right under my feet at various times. I replaced the drivers' side lower control arm and the noise disappeared. Now I'm getting the same noise in the '88 XJ but it's hardly a surprise -- I still have the original control arms after 18 years and 254,000+ miles. I don't think they owe me anything. Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted May 12, 2006 Author Share Posted May 12, 2006 Here is some more info..(Kinda makes the answers harder..sorry ;) ) Sway bar bushings and endlink.discos new, checked and greased. All control arms new as well as ALL bushings changed out. Even the PIA ones on the axle. All bolts checked and torqued. Peter, I ran out and checked this, last night. (On your request) I found the mount under/beside the T-case rusted thru. I thought this was it!! But after the repair, (Fender washers and new bolts) The noise is still there. ;( It REALLY sounds like a bad motor mount.....I still havent checked the tranny mount, but I just don't think it can move enough to make this noise if the motor mounts are fine.... I am afeared its a combo of the tranny AND T-case. HOPEFULLY, its just the T-case. Its up to my buddie Juans home Sat AM for the T-case swap..... Juan, I am heading down to Bills tonight, I want him to hear it and offer an opinion first. I'm getting the rebuild parts for the 231, as well... CW Link to comment Share on other sites More sharing options...
87manche Posted May 12, 2006 Share Posted May 12, 2006 could it be the exhuast hitting on the trans x-member? Link to comment Share on other sites More sharing options...
attaboybob Posted May 12, 2006 Share Posted May 12, 2006 could it be the exhuast hitting on the trans x-member? Peter already wrote that! what are you smokin? ...BOB Link to comment Share on other sites More sharing options...
ROADLESS Posted May 12, 2006 Share Posted May 12, 2006 Are you absolutely sure that it is not your trac bar? You mentioned that you tightened the trac bar mounts, but if the mounts are out or round, tightening may not necessarily alleviate the problem. I would loosen up the mounts just a little to check for any out of round 'play'. :idea: Link to comment Share on other sites More sharing options...
87manche Posted May 12, 2006 Share Posted May 12, 2006 could it be the exhuast hitting on the trans x-member? Peter already wrote that! what are you smokin? ...BOB well, it was some good stuff apparently. Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted May 12, 2006 Author Share Posted May 12, 2006 could it be the exhuast hitting on the trans x-member? Peter already wrote that! what are you smokin? ...BOB well, it was some good stuff apparently. IT WAS GOOD....In fact that IS what it was!!! I did not notice how close it was to the X member whan I replaced those bolts in the mount. the tranny mount is oil soalked from my rear main seal leak and has allowed the tranny and T-case to compress it. Redusing the distance of the exhaust and the X member!!! Now I just need to locate a mount..all local parts places need to order...If I am lucky, one guy will be able to get me one for noon Saturday!! Thank you ALL for the tips and suggestions!!! I had my hands on the noise and didnt even know it!!! a friend went right to it after driving my rig. CW Link to comment Share on other sites More sharing options...
juan Posted May 13, 2006 Share Posted May 13, 2006 Well if you get the mount come on down and we will swap it in no time - easier that pulling the t-case! Link to comment Share on other sites More sharing options...
Eagle Posted May 13, 2006 Share Posted May 13, 2006 Those mounts are expensive. Shim it. You don't need much clearance. Take out the bolts, insert one or two flat washers at each bolt location, and button it up again. Link to comment Share on other sites More sharing options...
Pete M Posted May 13, 2006 Share Posted May 13, 2006 I used some cheapie rubber mounts. And added a second for triangulation and trimmed My crossmember is custom, but something like that should work on the stock one. Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted May 13, 2006 Author Share Posted May 13, 2006 If the rain holds off....I am going to try to get the mount. But at the very least, I am going to try to add an additional hanger. I also need to adjust my center hanger as I am running a straight muffler and without the offsets it dosen't hang correctly. Juan, there is a couple NAPA's I forgot to call. I'll try them when they open this AM. In the mean time.....Sandras washing machine crapped out!!! No agitation, wish I HAD NO AGITATION!! :roll: :mad: CW Link to comment Share on other sites More sharing options...
juan Posted May 13, 2006 Share Posted May 13, 2006 Oh...Oh... that is going to cost you some jeep money! :cry: Link to comment Share on other sites More sharing options...
CWLONGSHOT Posted May 14, 2006 Author Share Posted May 14, 2006 It wasn't too bad....$400 and change...but she is HAPPY. there is ALOT ot be said for a happy wife!! I scored myself a new 12V cordless impact gun as well!!! I have been looking for a new cordless drill and thought one of these might fit the bill. It was $125, takes a 1/4" bit, turns at 2550 rpms and provides 1175 in lbs of torque. http://www.toolbarn.com/product/hitachi/WH12DMR/ Best of all, its the same batt as my old drill and that means I can keep my old friend!!! I had called Hitachi and was told the batts for it where no longer avalible. the new ones are a different shape, but identicle stats and fit and funtion fine!! Back to the really important stuff...Bill and I cleaned the TB yesterday. now I have a bit of a stumble off idle. I changed out the solinoid and now that works fine but the idle is still a bit high. Its 1000-1150 idle and 800-900 in gear. Its a intricate process to adjuat idle...don't wanna screw anything up but would LOVE the idle lower....guess its another trip to SVE!!! CW Link to comment Share on other sites More sharing options...
87manche Posted May 14, 2006 Share Posted May 14, 2006 sounds to me like the throttle plate isn't closing all the way, or the IAC got muckered up somehow. Link to comment Share on other sites More sharing options...
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