Quote:
Originally Posted by hemi43
Yes ! I've had issues with both Auburn style (cones) and clutch style that come in our Blazers when using synthetics. I'm not a chemist, but I assume it has something to do with the friction modifiers much like the difference between Dextron and F type transmission fluid.
On my Blazer, I used Amsoil synthetic in the transfer case as well as the front Diff, but because the front is just an open diff, I had no issues.
What's odd, is that it claims right on the Amsoil tech sheet that their oil is compatible with locking differentials.
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Yeah, my dad had the same problem in his blazer with a Detroit, and he used Schaeffer's synthetic. As soon as he took the synthetic stuff out and put regular 80w-90 in it, it worked perfectly.