Quote:
Originally Posted by someday31
Before I did the fluid change I gave the dealer my vin and they said mine called for the additive. I havent done the rotation in about 8000 miles....I think I will start with that and do as J Cat said and check the balancing. Thanks for everyones insight!
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don't sound correct that you have in this vehicle a limited slip rear diff. also lets say you do somehow have one this means you do not use synthetic oil but GL5 80-90wt gear lube with 4 oz of the additive.this is the G86 diff in the glove box door...
with a 4wd truck that has 2wd select switch you will have an eaton locking diff. this is a G80 code in your glove box door.this uses 75-90wt synthetic oil. tag on the rear diff will tell you this !
replacing the rear diff oil means removal of the diff cover and cleaning out the debris.using paint thinner /mineral spirits and a cloth and brush to get all that goop out ..
lets say this had the wrong fluid installed and the diff was never cleaned ...good chance this is why you get drivetrain noises...could be the pinion bearing etc....