Open diff to LSD

Post Tue Sep 13, 2005 6:36 pm

Hi Guys

Is it possible to convert an open diff to an LSD?

I know this was discussed breifly a few months ago, but there was no conclusion to this so i am posting again!!!

Q

Post Tue Sep 13, 2005 8:27 pm

IF you have the clutch pack then yes!

A

Post Tue Sep 13, 2005 11:41 pm

where can i get a clutch pack from please?

Q

Post Wed Sep 14, 2005 12:58 am

surely cheaper and easier to just buy an lsd diff

Post Wed Sep 14, 2005 9:34 am

Demlotcrew wrote:IF you have the clutch pack then yes!

A

If it's that easy, why are people always so concerned as to what the ratio is when they buy an LSD?

Post Wed Sep 14, 2005 10:11 am

Brianmoooore wrote:
Demlotcrew wrote:IF you have the clutch pack then yes!

A
If it's that easy, why are people always so concerned as to what the ratio is when they buy an LSD?

You need the whole cluster, (housing, end plate, clutches etc)

It's not as difficult as some think, to transfer the LSD unit in to an open diff'.

Post Thu Sep 15, 2005 5:19 pm

Ok...

I've got a 3.91 LSD Large case...

And a 4.10 Open small case...

Will I be able to make a 4.10 LSD? Is the Pinion height the same on a small and large case diff, and will it just be a case of moving the crown and pinion from the small case into the big case with a few new bearings and seals?

Cheers guys.

Post Thu Sep 15, 2005 5:24 pm

The internals on a small case are actually weaker (so I was told by a BMW technician).
Karl

Post Thu Sep 15, 2005 10:35 pm

Yes they are weaker.

No you cant make a LSD from your Large into your small case.

Like i said, you need the clutch pack. Brian not everyone can rebuild a diff, but if i had the correct tools it would be very easy.

A

Post Fri Sep 16, 2005 9:48 am

It should be possible to adjust the pre-tension on the clutchpack to provide more lockup too. Think it's done by re-shimming the pack. Have a friend who does it on his rally cars I believe.

Make it a bit more aggressive to drive though

Jai