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1,6,7,8 - Series and Mini Cooper General Chat related to models that do not fit into particular categories above. Please try to put your discussion in more appropriate sections. This section does cover the 1 Series, MINI Cooper and 8-Series vehicles: BMW 830i, BMW 840Ci, BMW 850i, BMW 850Ci, BMW 850CSi, M8, Alpina B12, BMW CS Concept and others.

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Old 05-25-2010, 08:58 AM   #1 (permalink)
42, The meaning of life
 
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What's my diff likely to be?

Just wondering if there was a standard diff used on the 2000 E38 740iL, or if it was dependant upon how the car was ordered? I think mine is a Limited Slip Diff, but is there an easy way to confirm it one way or another, either by inspecting the diff, or from the VIN, etc?

Looking to change the diff oil, just to prolong its life (hopefully).
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Old 06-01-2010, 08:41 AM   #2 (permalink)
42, The meaning of life
 
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Quaife vs Wavetrack??

Well from the research that I have done, it looks like none of the BMW factory diffs used in the E38 were limited slip. Looking into what options there are to upgrade a diff to LSD comes back with the recommendation of either Quaife ATB Helical LSD (UK based) or Diffsonline using a Wavetrack carrier. The Quaife unit is gear driven and supposed to be really solid, where as the Wavetrack unit still uses friction plates.

Has anyone ever come across a Quaife diff, and is the cost of converting an open diff to an LSD version worththe time and money?
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Old 06-01-2010, 09:15 AM   #3 (permalink)
OMFG another one!?
 
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I would think a replacement is far easier. Hopefully you can find one that matches your transmission gearing.
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