Quote:
Originally Posted by Joshinator99
If it’s a GM dealership you’d think they would have used the right fluid, but I trust them as far as I can throw them.
If that was your first time changing the diff fluid then that fluid was pretty cruddy I’d guess. I’d probably change that fluid again. They have to use a fluid with a friction modifier which the OEM fluid has. I’ve been using Red Line synthetic 75W-90 for years in mine for what it’s worth. But the differential should not be locking up like that.
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Thanks for the reply! Yea, was pretty disappointed a GM dealer can't fix it. I have to think it's common and others have experienced it? I'm hoping it's just fluid (again) - was changed and flushed at like 7K miles, now again at 24K I think. Pissed me off when they put a link in it, was like $700 and that hasn't done a thing. Going to go back, ensure I have a well trained guy working on the drivetrain, hopefully they listen.