65GS.com - Buick Gran Sport Enthusiasts!
Drivetrain => Differentials, Axles & Brakes => Topic started by: Weldar on October 20, 2011, 09:54:59 PM
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Service manuals call for Special Lube Spec #723 for use in the posi rear ends. Anybody know what an appropriate replacement would be?
Dwaine
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A name brand gear oil with a bottle of posi additive from your local GM dealer should do it.
For expert advice, check the forum here:
http://www.jdrace.com/ (http://www.jdrace.com/)
Jim Monzaz runs the site and known the GM rears better than I ever will.
Please report back with your findings! :thumbsup:
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I agree with Walt. I used the same as he suggests in my GS.
When I had my Ford 1 ton serviced, the dealer didn't have the Ford additive in stock, so they used another brand. It caused a chatter in the rear when turning. I changed it to the Ford additive , chatter gone.
I incurred the same thing with a Blazer I had. Made the mistake of using a non GM additive. Again chatter untill I corrected it with the GM additive.
Like Walt suggested, use a top quality gear lube and the GM additive.
Loren
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A name brand gear oil with a bottle of posi additive from your local GM dealer should do it.
For expert advice, check the forum here:
[url]http://www.jdrace.com/[/url] ([url]http://www.jdrace.com/[/url])
Jim Monzaz runs the site and known the GM rears better than I ever will.
Please report back with your findings! :thumbsup:
Checked the forum over on jdrace and see the same recommendation, also called the local GM dealer and let the service manager know what I was looking for and they also recommend the GM gear lube with the limited slip additive. Sounds good.
Dwaine