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Re: Rear diff questions (archive)
[ Follow Ups ] [ 3-series (E30) Message Board ] [ Msg. Board FAQ ]
Posted by Chris Graff on October 15, 2000 at 13:08:53:

In Reply to: Rear diff questions posted by Brian on October 15, 2000 at 12:48:23:

Don't worry. A 3.25 on an eta is the best of both worlds. Keeps the low rpm cruising, but gives you much better acceleration. A 3.73 is too much for an eta (as far as high RPM buzzing).

Go for a 3.25 LSD from a 5,6,7 series (E23,E24, E28). Should be relatively cheap. All you have to do is swap your rear cover onto the 5-series one and it's done.


What year/ model Bmw's will give me a 3.25 rear diff to swap onto my 86 325, is it a difficult process?, and will my cas milege suffer bad? I really dont want like 3,ooo rpms just to cruise at 75 mph. What will my revs be at normal highway speeds?? (around 70 75) I want to do this but im still a little weary about changing something this important. Will I really have a car that seems alot quicker?
Thanks for all your help! All you guys are great!!
Brian




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