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  BMW Forums » BMW discussion forums » BMW 5-Series
  Diff ratio mods

 Diff ratio mods



Has anyone here modified the diff ratios on a 528i? Does anyone here know the exact diff ratio sitting out the back of this model? I have seen varied reports... your help would be appreciated.
   Reply » Diff ratio mods

Depends on year and transmission.

For the standard European model, automatic up through 8/98 and all manual have the 2.93. Automatic from 9/98 has a 3.07 ratio. If you have an auto with the shorter final drive ratio option, it would be 3.46. The tag on the differential should have some ring/pinion numbers you can use to calculate the ratio.

There are many options available 3.15, 3.46, 3.64, 4.10..


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