Rear Uni Joint continually breaking - any ideas why?

Kieren
Here and there
Posts: 28
Joined: September 19th, 2009, 10:23 pm

Rear Uni Joint continually breaking - any ideas why?

Unread post by Kieren » August 1st, 2012, 11:07 pm

G'day all,

I've got an '03 TJ, and I'm having a few problems with my rear uni joint off the dif..

I keep destroying them.. In 8 months, I would have gone through about 5-7, 2 rear yokes, countless saddles... (On the plus side, I can now remove and fit a uni to the drive shaft in under an hour)

I finally managed to notice that the passenger side chassis mounted lower control arm mount hole had egged out a little, which I assume was causing all my problems, allowing the axle to move under power, so after getting that welded up, it all seemed sweet, didn't have any issues, and could put my boot into it no worries..

And now it seems to have some back to haunt me, granted the last two times were a bit extreme (Managed to get a tad airborne out bush, later that arvo reversing out of a car park, the uni gave out. The second, was out playing with the boys, got a bit sideways and hit a little rut which seemed to be enough of a jerk to destroy yet another uni)

I can't really think of any other causes or solutions except for taking the 6 hour drive to the city, finding a suspension/drive-train specialist and letting them take a look-see..

I'm currently running a 2.5" lift, SYE kit, Tom Woods rear drive shaft and 325/65R15 Muddies.

Cheers,
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Not_An_Abba_Fan
Been here a while
Posts: 494
Joined: July 19th, 2011, 10:11 am

Re: Rear Uni Joint continually breaking - any ideas why?

Unread post by Not_An_Abba_Fan » August 2nd, 2012, 11:40 am

Usually the things that contribute to uni joint failure are over size tyres and driving style. Your tyres are slightly bigger than stock, so it wouldn't be that much of an issue, which leaves driving style. Less slam the foot down and more easing on of the power wouldn't hurt.
Southwest Performance Exhaust

BLU-125
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Posts: 5493
Joined: July 12th, 2003, 10:43 pm

Re: Rear Uni Joint continually breaking - any ideas why?

Unread post by BLU-125 » August 2nd, 2012, 7:57 pm

I would suggest that you bin the yoke that uses straps and fit a yoke with u-bolts as a first step......
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