Hello, I am new.
This is a Chevy 1500 crew cab half ton, 2012 5.3L. I find it hard to find specific info on the additive question. the VIN code does not tell me if it's locking or limited slip. It only tells me 3:42 ratio. I have read where someone on here said all GM after a certain date uses NO additive.
My father and I serviced my rear diff, we put Mobil 1 synthetic 75w90 and NO additive. I don't hear any noise out of it; did we do right by not using a friction modifier?
This is a Chevy 1500 crew cab half ton, 2012 5.3L. I find it hard to find specific info on the additive question. the VIN code does not tell me if it's locking or limited slip. It only tells me 3:42 ratio. I have read where someone on here said all GM after a certain date uses NO additive.
My father and I serviced my rear diff, we put Mobil 1 synthetic 75w90 and NO additive. I don't hear any noise out of it; did we do right by not using a friction modifier?
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