Change gear oil in a 12 bolt

[BJCHEV396]

Hi guys,I've never changed the oil in the 12 bolt of my Camino.Would 2 quarts of 80w90 and a 4 oz.bottle of posi additive be enough?Thanks,Bill.

[bcmiller]

2 quarts is usually enough.

[big gear head]

Yes, unless you spill some.

[CamarosRus]

Big Gear Head............Could you list what options we have for POSI ADDITIVE ????

[big gear head]

The GM additive still works most of the time. The Ford additive seems to work better, if you don't mind putting Ford oil in your Chevy. Amsoil makes a good additive. I don't like the stuff that comes in a tube at the auto parts stores.

[SS427]

Originally Posted by big gear head

Yes, unless you spill some.

Don't spill it! You will have that unique smell in your shop/garage for weeks and it permeates everything!

I use only GM posi additive as I have had issues with anything else as far as clutch chatter.

[Too Many Projects]

Draining the old, used oil, is the strongest and worst, smell and there is no way to avoid getting that smell in a building, unless it is drained outside. The new oil, almost, smells good, compared to the old "stuff"...

[Salvatore]

I use the GM positraction axle gear lube in the old metal quart cans. I also use the limited slip differential fluid that comes in those small plastic containers. The old sperm whale fluid that is tuff to find these days.
I personally think it is better for the old original gears and posi plates.

[BARRY]

Originally Posted by Salvatore

I use the GM positraction axle gear lube in the old metal quart cans. I also use the limited slip differential fluid that comes in those small plastic containers. The old sperm whale fluid that is tuff to find these days.
I personally think it is better for the old original gears and posi plates.

HI YES old school metal cans of oil the best

[Rsconv68]

IIRC, all 12 bolt rear axles were not automatically a posi traction.