Killed my LSD!

dnb · Post by **dnb** » Fri Feb 15, 2008 11:24 pm

Took the Griff out for a bit of a hoon tonight and realised that the right hand rear wheel was just spinning on hard acceleration.
So the LSD is finally dead.

It's been knocking for ages, but tonight has killed it.

So, where can I get parts for an antique GKN diff?

stevieturbo · Post by **stevieturbo** » Sat Feb 16, 2008 11:15 am

What parts ?

Can you just replace the diff unit itself with another, or is the CWP damaged too ?

Gearboxman ? That Gripper diffs guy ? Quaife ?

John Felsted might know some LSD contacts too ?

davemgb · Post by **davemgb** » Sat Feb 16, 2008 12:01 pm

Why not try GKN - http://www.gkndriveline.com

Dave

dnb · Post by **dnb** » Sat Feb 16, 2008 4:00 pm

CWP should be fine - under light use, the car behaves.

GKN driveline seem to be a bit like Delphi - not interested unless you order several million of anything

I'll speak to some contacts on Monday.

davemgb · Post by **davemgb** » Sat Feb 16, 2008 5:09 pm

I thought GKN had a small department somewhere that dealt in one off repairs for enthusiasts - only reason I suggested them.

Dave

dnb · Post by **dnb** » Sat Feb 16, 2008 6:18 pm

They may do, but I haven't found it yet.
I'll keep looking

mgbv8 · Post by **mgbv8** » Sat Feb 16, 2008 7:31 pm

Phantom Grip form Jon savage at Cmabridge motorsports is a good budget locker.

I've emailed GKN on 3 occasions asking for someone to contact me about advice and prices for a LSD but they never return the messages?

Robrover · Post by **Robrover** » Mon Feb 18, 2008 4:14 am

A Quaife ATB would be a good option and probably more enduring.

russell_ram · Post by **russell_ram** » Mon Feb 18, 2008 8:56 am

dnb,

I'm not familiar with the TVR diff as such, but if it's a GKN 4H based unit, as are many, then it is the same core internally as any of the Jag units. I rebuild lots of those for the Cobra community and might be able to help you out (or any of the std Jag people - Wards, John gordon, SNG Barret etc).

Russ

dnb · Post by **dnb** » Mon Feb 18, 2008 10:59 am

Thanks Russ!! YHPM

I don't believe TVR would use anything totally unique. Bespoke mechanicals were simply too expensive for them at the time. I'm fairly sure it will be as you say - standard Jaguar.

CarlosV8 · Post by **CarlosV8** » Sun Sep 12, 2010 10:01 pm

Apologies for digging this up from the depths of the forum, but it appeared in a Google search.

I'm looking at getting the GKN diff in my TVR rebuilt - if dnb is about, what did you do with yours in the end?

Cheers

Carl

dnb · Post by **dnb** » Wed Oct 13, 2010 12:22 am

Sorry for spotting this so late! The TVR diff is borrowed from an old Maserati, and if you have the LSD GKN diff it is already a Quafe ATB type thing. Nice when it works.

I managed to find some spares for mine. It turns out the LSD itself wasn't dead, but the bearings were destroyed causing lots of shunting and general ill behaviour.

(Diagnosis wasn't helped by me completely destroying the clutch at the same time, but that's another long story involving a shredded friction plate due to the clutch not being fit for purpose and a very big argument)

I had a local mechanic - a historic rally car specialist - rebuild the diff with new bearings and solid shims instead of the collapsable thing it had from the factory. Some bearings were hard to get so we had to improvise a little.

It's a couple of years on now and the diff has never been better. I can recomend the solid spacer route as far superior to standard if the car has any power/torque increasing mods.