Hi all,
I would kindly like to know for this 1992 XJS 4.0 which rear differential is fitted in order to replace the appropriate oil
open differential or limited slip ?
thank you
James

 

James,

All XJSs have LSDs

Cheers

Paul

 

Thank you Paul,
so a Castrol Transmax Limited Slip Z 85W-90 could it be suitable ?
Cheers

James

 

James, this photo shows what the handbook says (from my 1992 4.0 XJS). I think it means only refill with Shell Spirax Super 90, which is no longer available. I don’t know what to recommend and hope another forum member can advise. Another page in the handbook says a refill takes 1.6L.

 

There's nothing exotic about the Jag diff. I'd feel comfortable using any name brand GL5 80/90 gear oil. As far as I know all the usual suspects offer a GL5 that's formulated for limited slip diffs and will say so right on the container. Or buy a standard GL5 80/90 and use a limited slip additive.

Cheers
DD

 

Thanks Doug.

 

James,

You could fill with Castrol Transmax Limited Slip 85w90, readily available.

Last change on my 4.0, I switched to Castrol Syntrax Limited Slip 75w140, which also seems fine.

Just make sure it specifically says "Limited Slip" as opposed to their standard gear oil.

Good luck

Paul

 

Thank you Paul and Doug