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Differential noise with Amsoil diff.oil



I changed the diff. oil to Amsoil 75/90 Diff. oil (which was highly
recommended) on Thursday on my 1991 E34 M5 and now I hear a grinding
noise when backing up and turning at the same time.I even added the GM
graphite lsd additive-the noise is still there!Maybe I should switch
back to the OEM diff. oil or is it some other problem?Has anyone had
similar problems?
Mel Abrahams
'91 E34 M5 Sharked,etc

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