W123 limited slip Diff - PeachParts Mercedes-Benz Forum

OM616 · #1 01-03-2011, 05:45 PM

I originally posted this over in the performance paddock not being sure where the best place to ask. Please do not hesitate to remove this if it doesn’t belong here.

I got a call today from a customer of mine today. He wants me to design and build a limited slip differential for his 82 300D.

I asked him if there was already such a thing he could just buy, and he said that he could not find anything. I have not looked myself, but bet it would be a rare thing if it was available, but rare is still cheaper than a custom made one off.

Any thoughts as to where he should be looking?

I did get a suggestion to look at a 126-107 diff. I then asked if there are limited slip diffs for a 126, would they be a direct swap, or would it require fab work and custom axels. I have heard that some early 126 parts will fit on a 123, but not sure about the axels and such.

I am putting together a quote to design and build a custom carrier that would have an aftermarket locking mechanism. I still need to find out the number of splines that are on the inner CV joint, what the OD of the splined shaft is, and how long it is.

Needles to say it will not be cheep as it will be a one of a kind piece, so if it is practical to find a posi diff out of a different model, I will direct him toward that before I start the clock.

Thanks,

Dave