Rear Diff Shudder

[JFK]

I have a 96 jeep which has started to shudder intermittently when I take off and turn/veer right. I have had the oil changed and an additive (slippery one) included. This has reduced the shuddering but it still happens. What's next?

[dxj]

Hi,

Assuming you don't have a brake binding or some other non diff problem:-

Shudder is a common problem in clucth type LSD. My 96 holden felt like the independant LSD was going to jump out sometimes, very embarassing when other people in the car. My friend was service manager at local Ford dealer and said Ford had same problem too with LSD.
Solution is to change to synthetic oil for LSD. I think it is castrol brand. Very expensive but cuts the LSD clutch chatter heaps. Doesn't fix completely, just makes much better. In the case of my Holden I have done 80K km since oil change ( 210k total) with almost unnoticable problem now. LSD still works as you expect too.The real fix for your problem is to get the LSD clutch cone re-machined. My opinion is that to pull diff apart means you should put in an Air Locker. :D :D
My friend is moving house today and uncontactable. I will call him in the next day or so and get the right name of the oil. graemlins/beerchug.gif

[ 08 January 2003, 08:48 PM: Message edited by: dxj ]

[dxj]

Hi,

My friend said oil used for LSD shudder is Mobil SFXA 85-140 Synthetic. I checked on Mobil web site etc and couldn't find this graemlins/dunno.gif Maybe he meant Mobil SHC ID sythetic gear lube. Their web site quotes this reduces LSD shudder.
Also checked out Penrite web site. There is claim taht their synthetic 140W gear oil fixed a patrol rear axle shudder.

Are you sure it isn't some other problem such as trans or engine mount etc transferring through the driveline and feeling like a diff problem?

[ 10 January 2003, 02:53 PM: Message edited by: dxj ]