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Re: 94 540i Differential (archive)

[ Follow Ups ] [ 5-series (E34) Message Board ] [ Msg. Board FAQ ]

Posted by Jason Blitz on November 22, 2000 at 12:45:10:

In Reply to: 94 540i Differential posted by John Gimpl on November 21, 2000 at 12:57:25:

I highly reccomend the diff. The 540 doesn't have a limited slip either. Go to and ask to talk to Jack. I went through several differentials on my 94 540 and I had the best luck with a 3.15 lsd. It is approximately a 10% increase and made a wonderful difference in my car - most of the people that have been in my car can't believe what aa animal it has become - your car will no longer feel like a slug at the stoplight either . . . . The limited slip helps alot too. Most of the other differentials 3.64, 3.91 etc are too much gear for an automatic - with a 3.15 the gears are perfect.

My highway mileage is exceptionally nice 23.5 @ 85mph. Around town with my foot in the throttle is around 16.5 or so. FYI, I also have the Dinan air tube and tranny chip and Conforti engine chip which combined, makes the car feel like a real muscle car. Anyway, if you get the diff from Korman, it is remanufactured and it will set you back $1600 and Dinan is priced the same. Vines has them for $495 or so - They're usually out of a 750 or 850. Jack knows his bimmers and will help you with whatever you need.

Diffs are commonly thought of as a poor mans supercharger - it's definately a step in the right direction and it just bolts right in - the pickup for the speedo is on the back of the differential and is already calibrated to your speedo in the car. 2-3 hour job.

Good luck,
-Jason Blitz

Can anyone tell me how much of an effect a new diff has had in their car and which one they put in? I have been considering a 3:64, 3:73 or a 3:91. I would love any feedback, Positive or Negative.

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