Quote:
Originally Posted by sherpaguy
Need some advice on when to change the differential oil and the procedure. It was done at 20000 kms and that was 2 years ago, now it's at 50000 kms. Recommended oil? 
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go to hall of wisdom, for detailed procedure it is simple.
Change out every 12,000 miles or once per riding season, regardless of miles.
Now, watch this get beat to hell on a public forum...
I have used BMWGear Oil 75/140. I no longer recommend it anywhere but in the transmission.
I have since returned to BMW hypoid gear oil 80/90 GL-5 in the final drive. 100,000 miles
GL-5 seems to be required
best wishes on your 01/02 they were the best build years