Originally Posted by gman2304
2005 Chevy Avalanche 2wd 1500 G80 locker 206,000 miles.
Out: FF. Didn't look too bad, dark amber color
In: Mobil Delvac 1 75w90
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Update: I noticed a few drips on the garage floor from the diff cover over the weekend. I took my truck back to the shop that changed the diff oil for me this morning and they drained and saved the Delvac1. They cleaned the Felpro paper gasket off and used grey rtv with no gasket this time. They said a large percentage of diffs leak when using a paper gasket so we'll see if just the rtv works.