Transmissions and DrivetrainNeed help with your trans? Problems with your axle?
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If you have the 7.5 10 bolt with an Auburn then use 80W90 gear oil and 2 bottles of GM additive. If you have a 7.5 with the Governor Lock then just use 80W90 gear oil and no additive.
Most everyone says 1 bottle of addtive for a posi/ls
but like for my 12bolt posi/ls I was told 1-1/2-2 since its larger/hold more oil, so it needs more addtive.
I got mine cheap from fleebay at Smittys but a GM dealer should have some too.
Most everyone says 1 bottle of addtive for a posi/ls
but like for my 12bolt posi/ls I was told 1-1/2-2 since its larger/hold more oil, so it needs more addtive.
I got mine cheap from fleebay at Smittys but a GM dealer should have some too.
It's not too thick, but will increase drag a little bit. The 80W140 is usually used for towing applications.
ok ,thanks...i think that's what is in there ...just put it in this summer...so you say it won't damage anything with the 80-140?....i can always add a little 80-90 i guess...thanks.
ok,,i don't remember why i put the 80w140 in ...i guess i can always drain it and put in the 80w90 in the spring...i was just worried with the thicker oil it would cause damage...i have a 3-23 auburn posi and i don't want to ruin it....thanks for all your help..
It not gonna hurt anything but save your money next time, if real muscle cars of the 70s were fine on regular dino 80-90 and some addtive, why fall for techno hype to get you to spend 3 times as much........
