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12-01-2018
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CrawlerStar
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Join Date: May 2017
Location: Victoria
Posts: 454 What Jeep do I drive?: XJ
Likes: 259
Liked 86 Times in 64 Posts
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Good vibrations....
Hey all, as per title my XJ has some lovely vibes. Theyre pretty constant, but you can feel it through your ass badly at 75 and 100kmh. Would I be looking @ dshafts and unis? Also my wheels got balanced and aligned the other day.... any recommendations? all stock, new gearbox mount too (do I need to loosen this?)
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12-01-2018
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CrawlerStar
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Join Date: May 2017
Location: Victoria
Posts: 454 What Jeep do I drive?: XJ
Likes: 259
Liked 86 Times in 64 Posts
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Should I jack it up, chuck it in drive on stands and get it up to speed to see if it vibrates without the front driveshaft in the way ? Cheers .
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12-01-2018
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AJOR Bronze
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Join Date: Apr 2013
Location: Blackall Outback Queensland
Posts: 1,736 What Jeep do I drive?: XJ
Likes: 1,286
Liked 947 Times in 637 Posts
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Hamish could be a number of things might be the uni at the diff if the back end is sloppy could be your rubbers hard to say check for play in the uni joint xjs are getting on in yrs rubbers sensors and bits n pieces need replacing
_____ooooo
/__l_l_,\____\,___
l_---l_l__l---[ ]llllll[ ]
_.(o)_)__(o)_)--o-)_)
__________________
96 XJ Limited LPG Conversion......
99 XJ Sport ... Finally on the Road
RC Mini Me
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14-01-2018
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CrawlerStar
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Join Date: May 2017
Location: Victoria
Posts: 454 What Jeep do I drive?: XJ
Likes: 259
Liked 86 Times in 64 Posts
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Quote:
Originally Posted by LuluBelle
Hamish could be a number of things might be the uni at the diff if the back end is sloppy could be your rubbers hard to say check for play in the uni joint xjs are getting on in yrs rubbers sensors and bits n pieces need replacing
_____ooooo
/__l_l_,\____\,___
l_---l_l__l---[ ]llllll[ ]
_.(o)_)__(o)_)--o-)_)
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I had the rear driveshaft out not long ago, the uni felt good. Can the front one cause similar issues?
Also I have messed with the gearbox mount. Does anyone know the distance between the TC and their bash plate?
Also as my diff is shit, could it be a worn pinion causing bad vibration?
Thanks.
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14-01-2018
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Full Flexer
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Join Date: Mar 2016
Posts: 1,133 What Jeep do I drive?: XJ
Likes: 109
Liked 640 Times in 436 Posts
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Quote:
Originally Posted by HamishW96
I had the rear driveshaft out not long ago, the uni felt good. Can the front one cause similar issues?
Also I have messed with the gearbox mount. Does anyone know the distance between the TC and their bash plate?
Also as my diff is shit, could it be a worn pinion causing bad vibration?
Thanks.
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did you mark & keep rear driveshaft in same orientation during R&R ?
apparently the trans space is ~1", mine is a bit less from age, needs replacing
I doubt a worn pinion bearing would cause vibration unless it was terminal, is there excessive freeplay...like 1/4"?..would be awful noisy
mine vibrates a bit at ~90-95kmph (it needs a wheel alignment)
the trackbar joints can be worn
I would start with the basics things
__________________
'96 4.0 Sport 370k+
'96 Limited 263k (unreg spare)
'96 Sport 335k (got smashed, farmtruck)
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24-01-2018
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CrawlerStar
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Join Date: May 2017
Location: Victoria
Posts: 454 What Jeep do I drive?: XJ
Likes: 259
Liked 86 Times in 64 Posts
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Quote:
Originally Posted by awg
did you mark & keep rear driveshaft in same orientation during R&R ?
apparently the trans space is ~1", mine is a bit less from age, needs replacing
I doubt a worn pinion bearing would cause vibration unless it was terminal, is there excessive freeplay...like 1/4"?..would be awful noisy
mine vibrates a bit at ~90-95kmph (it needs a wheel alignment)
the trackbar joints can be worn
I would start with the basics things
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There's a lot of noise from the diff.
I had it up in the air the other day running in drive, the rear wheels looked to be not rotating on a solid axis. They looked like they were moving slightly off centre like both axles are bent. Unsure if this is the case... Is this normal?
All my driveshafts feel okay, didn't spend too much time down there as it burnt the shit outta my arm and took a heap of skin off
How do I check the suspension components?
Also I didn't line up the DS but can only spin one more rotation. I think it was correct as I just removed the uni joint on the diff end (the 4 bolts) but didn't pull it out of the DS.
Last edited by HamishW96; 24-01-2018 at 09:36 AM.
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26-01-2018
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CrawlerStar
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Join Date: May 2017
Location: Victoria
Posts: 454 What Jeep do I drive?: XJ
Likes: 259
Liked 86 Times in 64 Posts
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I'm pretty sure it's the diff. I think the axles are bent.
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