Part # 1052271 Rear Axle Lubricant

[Kurt B.]

Is this GM Axle Lubricant approved for my 68 Positraction rear end or is it for regular GM rearends only?
I don't want to do any damage or cause any problems.
Thank you,
Kurt #26406

[Duke W.]

Re: Part # 1052271 Rear Axle Lubricant

1052271 is okay for all vintage Corvette axles (and manual transmissions) and so is any commercially available SAE 80W-90 GL-5 gear oil, which will probably be cheaper.

If the axle is Positraction you must add at least one 4-oz. bottle of 1052358 friction modifier additive (or equivalent) to prevent Positraction clutch chatter.

IIRC the capacity of the Corvette axle is speced at 3.7 pints.

Duke

[Kurt B.]

Thank you Duke *NM*

[Joe L.]

Re: Part # 1052271 Rear Axle Lubricant

Kurt-----

GM #1052271 is GM-discontinued. It's replaced by GM #89021671. That's what I recommend you use.

[Ken A.]

Re: Part # 1052271 Rear Axle Lubricant

My rear end guy recommends the posi fluid from Ford. Says it's better & cheaper than GM. Also, I don't know the part numbers, but the last time I tried to buy the GM posi fluid (2 years ago), it was no longer available in Calif.

Ken

[Duke W.]

Re: Part # 1052271 Rear Axle Lubricant

AFAIK the Ford and GM addtive is the same along with other OEMs.

Any clutch or cone type LSD needs the same addtive.

Duke