Thread: HELP: Grinding, ROARING rotating sound coming from rear
View Single Post
  #27  
Old 04-08-2009, 03:15 PM
Wayne's World's Avatar
Wayne's World Wayne's World is offline
Member
  
Join Date: Jan 2009
Location: Easton, PA
Posts: 491
Wayne's World is on a distinguished road
I dont' see any metal filings in the fluid. However: I called 2 dealerships and spoke to the parts counter and the shop foreman at 1. They both said that the vehicle calls for Castrol SAF-XJ (75-140) as it has a limited slip in it. This is for both the front and rear diffs.

So for 1, I definitely don't have the right weight in there as I used 75w-90 and it had no Limited Slip additives.

Talking to a buddy of mine who has his own race team, he said that the combination of the low fluid level and wrong fluid could have caused one or both of the side diff bearings to go bad and that's actually making the noise.....
__________________
----------------------------------------------
2006 X5 3.0L - Schwarz Black/Truffle Brown
Stock
But I keep it clean
Reply With Quote

Sponsored Links