Found a diff now I need advice.

[phrekus]

So...

I found a 4.10 LSD from a 91 325is for $120. I am hoping to purchase this as an upgrade for my 91 318is that is sporting an open diff at the moment. I have found a lot of conflicting info over which is best and what will fit so I figured I would just ask for advice. So far the only thing I know is what I already mentioned and that it has around 100k miles on it and is in "good" condition.

My 318is is not my DD and while I want to keep it "street-able" I am trying to get as much track performance out of it as I can. Any advice would be great!

Thank you!

[tom d]

it's the right diff! this is a medium case and a little longer/wider, just loosen the nut where the two halfs of the driveshafts meet and shorten the lenght. run some redline gearoil. put it in and enjoy powering out of the corners.