TECHNICAL FORUMS => General Tech => Topic started by: bear555 on April 27, 2011, 11:45:06 AM
Title: XJ Drive line vibs
Post by: bear555 on April 27, 2011, 11:45:06 AM
So ever since I put the new HD Leafs in my 99 XJ I\'ve noticed some drive line vibration. I\'ve replaced the U-Joints and no improvement. SO I\'m thinking I\'m going to tune the pinion angle. Looking at her rear end, the pinion seem to be pointing a bit high. This is most likely due to the over sized shackle.
So question, where in town can I get 2.5\" width shims so I can work on it this weekend. Looking for 2* and 4*
Thanks.
Title: Re: XJ Drive line vibs
Post by: bear555 on April 28, 2011, 06:39:03 AM
Too late, I ordered http://rustysoffroad.com/mm5/merchant.mvc?Screen=PROD&Product_Code=RC-SHIMA&Category_Code=LEAFACC 3 degree shims to be here by Friday so I can give it a shot Saturday when the weather is nice. I\'ll try to remember to take some pictures, and write it up.
Title: Re: XJ Drive line vibs
Post by: rejeep on April 29, 2011, 08:16:43 AM
it takes a lot of lift to make the rear pinion out of whack on a XJ... i would keep the investigation going..
did you actually measure the pinion angle? do you have a SYE installed? did you disco the front DS to eliminate the front axle as culprit? i think your shims if that really is the case will be a band aid and only mask the problem..
just my .02 cents..
Title: Re: XJ Drive line vibs
Post by: bear555 on April 29, 2011, 09:27:12 AM
I\'ll take that advice, I was thinking about getting an angle gauge anyway, and I\'ll try the Front drive shaft removal. Conversely removing the rear drive shaft after removing the front (and putting the front back on in 4WD) would complete the swap and really prove if its one or the other.
Oh and no I don\'t have an SYE
-Ian
Title: Re: XJ Drive line vibs
Post by: MrMindless on May 01, 2011, 09:27:31 PM
without an SYE you need to plug the hole in the tcase to remove the rear and drive with the front only.
Assuming it\'s an internal SY of course. Some are external and what I said doesn\'t apply.
Title: Re: XJ Drive line vibs
Post by: bear555 on May 06, 2011, 09:49:54 PM
Oh yeah i forgot about that.... I\'ll find out soon.
Title: Re: XJ Drive line vibs
Post by: bear555 on May 07, 2011, 06:25:52 PM
Since the rear output of the transfer case is a outie I pulled the rear shaft and drove around and it was smooth as glass. I measured the pinion vs the output and it was of by 3 degrees. Since my shims were 3s I put them in, no difference. SO its not the pinion angle I\'m hoping its not the output bearing on the transfercase.
Title: Re: XJ Drive line vibs
Post by: Wingman on May 08, 2011, 08:50:22 AM
Driveshaft weight get popped off and out of balance?
Title: Re: XJ Drive line vibs
Post by: bear555 on May 08, 2011, 02:36:03 PM
Might be next on the \"start with the cheapest fix\" list. how much is a balance? Also will an out of balanced drive shaft vibration vary based upon engine load?
Title: Re: XJ Drive line vibs
Post by: Wingman on May 08, 2011, 03:38:41 PM
Not sure on either question. Call Vic at Ontario Engine and Machine (OEM). He\'ll answer both.
Title: Re: XJ Drive line vibs
Post by: rejeep on May 11, 2011, 08:09:02 AM
SYE and a CV shaft and be done
Title: Re: XJ Drive line vibs
Post by: bear555 on May 11, 2011, 06:33:57 PM
I\'m thinking that\'s they way I\'ll have to go. After I get my new tires :) Since the 242 is an outie, the hack and tap should be easy.
Title: Re: XJ Drive line vibs
Post by: rejeep on May 13, 2011, 01:22:44 PM
easy an right are 2 different things..
Title: Re: XJ Drive line vibs
Post by: bear555 on May 13, 2011, 10:53:54 PM
? Is there an SYE kit that will fit the 242? I thought the hack and tap was the only option for the 242.
Title: Re: XJ Drive line vibs
Post by: rejeep on May 14, 2011, 11:01:45 PM
didnt see a 242
Title: Re: XJ Drive line vibs
Post by: bear555 on May 15, 2011, 05:51:15 PM
Your right , my bad I thought I had written it above..
