Quote:
Originally Posted by ah-kay
Really? It is all in the mind.
I use the cheapest gear oil and never have a problem or hear louder noises. Also I do not buy the theory that it will loosen all the dirt and grime inside a diff. This is not a wrist watch mechanism. The gear is BIG. Have a beer and relax.
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Cheapest gear oil will work wonderfully on a dirty diff.
But synthetic oil in a dirty diff is a bad thing. I've seen this happen several times. I never blindly install synthetic oil in a diff that used conventional oil all it's life. I have to open it up first, look inside to see the condition and clean it out if necessary. Then install the synthetic oil.