Friction modifier, how much to add?
Thread Starter
Melting Slicks
Joined: Aug 2012
Posts: 3,487
Likes: 83
From: Titusville Florida
Yes, posi additive. This is the one I was looking to get
http://www.autozone.com/autozone/acc...ier=17352_0_0_
http://www.autozone.com/autozone/acc...ier=17352_0_0_
Thread Starter
Melting Slicks
Joined: Aug 2012
Posts: 3,487
Likes: 83
From: Titusville Florida
Racer
Joined: Jan 2013
Posts: 322
Likes: 0
From: Mountains of Maine
Is it this?
http://www.amazon.com/GM-Performance.../dp/B0028CMPIS
Do you know what was put for fluid when you had it rebuilt?
http://www.amazon.com/GM-Performance.../dp/B0028CMPIS
Do you know what was put for fluid when you had it rebuilt?
Thread Starter
Melting Slicks
Joined: Aug 2012
Posts: 3,487
Likes: 83
From: Titusville Florida
No I don't know what they put in it, I'm sure it was the 75 90 judging by the consistency of it (the stuff that has leaked onto the garage floor that is)... As for the additive I'm going to get the stuff from Autozone unless I can get to a Chevy dealer on the way home this afternoon.
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Melting Slicks
Joined: Sep 2010
Posts: 2,413
Likes: 59
From: Emerald Isle NC
Use the GM additive.
On my recently rebuilt diff, the rebuilder spec'd Lucas 85-140 and one bottle of GM posi additive at the 500 mile point. Lucas diff lube has no additives included. Some do. If the lube you use says it contains the limited-slip additive, I would still add a bottle of the GM additive.
Some say 1 bottle. Others say two. I think either is okay.
Carter
On my recently rebuilt diff, the rebuilder spec'd Lucas 85-140 and one bottle of GM posi additive at the 500 mile point. Lucas diff lube has no additives included. Some do. If the lube you use says it contains the limited-slip additive, I would still add a bottle of the GM additive.
Some say 1 bottle. Others say two. I think either is okay.
Carter
Burning Brakes
Joined: Aug 2006
Posts: 911
Likes: 8
The oil may say "limited slip" but that does NOT mean it has the additive in it. Personally, in 30 years, I've never seen gear oil with the additive already in it. It usually says it's for limited slip, but it still doesn't have the additive in it.... they are just claiming it's appropriate for limited slip diffs.