White96k2500
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So i have a leaking rear riff, 8lug 14 bolt semi float with 4.10 gears and g80. What kind of fluid goes in the rear diff? And does the g80 require a additive?
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How would a friction modifier affect a locker's performance? It's centrifugally operated.
I'm not going to pretend to know the answer to that, but I have experienced it first hand. I had the diff oil changed in my red truck (10 bolt G80) and my mechanic added some friction modifier. It was super unpredictable after that, much more so than usual. Drained it and refilled with the GL5 80W-90 I linked above and it was back to normal. GM has a TSB on this confirming exactly what I experienced:
https://www.chevytalk.org/fusionbb/showtopic.php?tid/256237
You and I (and a few others) have actually discussed this previously in a different thread.
https://www.gmt400.com/threads/differentials-75w-90-vs-75w-110.43445/
so should i go with 75w-90 or 80w-90?
Yes i saw but i was gonna try to find something a little cheaper as I'm about to start a full front end rebuild then have to get an alignment then buy some tires so i was gonna try to find something cheaper or use some fluid my father in law has but i believe it has the additive, do you know any other products that would be cheaper?I use the ACDelco GL5 80W-90 that I linked above. That's what I would recommend.
Yes i saw but i was gonna try to find something a little cheaper as I'm about to start a full front end rebuild then have to get an alignment then buy some tires so i was gonna try to find something cheaper or use some fluid my father in law has but i believe it has the additive, do you know any other products that would be cheaper?
That’s the problem i am running into everything i can find has it, sorry for the question as i am not very knowledgeable about this kind of stuff but what is the difference between 75w-90 and 80w-90? Is the 80w-90 just thicker?I do not, sorry. It seems like most of the off the shelf options have the additive in them already.