Differential noise
Thread Starter
Cruising
Joined: Jan 2013
Posts: 10
Likes: 0
Differential noise
I just finished an engine, transmission, and differential swap-out on my 73 coupe. Everything seems normal but when I coast to a stop I hear a light whine coming from the rear end. Anyone out there have any advice or solution.
Burning Brakes
Joined: Sep 2005
Posts: 1,050
Likes: 205
From: Lewes Delaware
Besides the oil you installed, you have to add the GM additive for posi traction rear ends. It is available at any GM dealer in 4oz bottles for about $12. Take about at least 4 oz of oil from the rear end, then add the additive. Refill the rear end with oil until it overflows. Go to a large parking lot and drive in tight figure 8's. do about 12 of them to work the additive into the clutches.
Let us know how this turns out.
Let us know how this turns out.
Le Mans Master
Joined: Jan 2006
Posts: 6,506
Likes: 139
From: Butler Pa
Besides the oil you installed, you have to add the GM additive for posi traction rear ends. It is available at any GM dealer in 4oz bottles for about $12. Take about at least 4 oz of oil from the rear end, then add the additive. Refill the rear end with oil until it overflows. Go to a large parking lot and drive in tight figure 8's. do about 12 of them to work the additive into the clutches.
Let us know how this turns out.
Let us know how this turns out.
The sound he describes is not coming from the clutches. Possibly a set up issue.
Good points.
Melting Slicks
Joined: Jul 2010
Posts: 2,503
Likes: 33
From: McGrady NC
St. Jude Donor '15-'16
I assume you used new u-joints and didn't set them too tight...
Last edited by CaseyJones; Jan 28, 2013 at 02:22 PM.
