Rear End Additive
TECH Addict
Joined: Jun 2002
Posts: 2,428
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From: Las Vegas, NV
Originally Posted by tici
On the Torsen homepage they say GM requires the additive because some units have a little noise 
The Eaton is a little forgiving and IIRC the newer ones (as in the past 8 years)with the carbon fiber clutches don't need the additive. But the Auburn needs only dealer additive, the parts store stuff in a tube does not work.
http://www.torsen.com/general/general_faq.htm
Is it true that the Torsen unit in the production Camaro needs the GM modifier added?
GM issued a technical bulletin adding modifier to the rear axle oil. This was done to quiet what we call a "Rusty Screw" noise that we heard in a very small percentage of vehicles. This does not happen in all cases, however to address owner's concerns we asked that the modifier be used in all instances to insure that the driver would not get this noise. When replacing the fluid it is at the owner's discretion whether or not to add the modifier. Elimination of the modifier does not affect durability of the differential.
Is it true that the Torsen unit in the production Camaro needs the GM modifier added?
GM issued a technical bulletin adding modifier to the rear axle oil. This was done to quiet what we call a "Rusty Screw" noise that we heard in a very small percentage of vehicles. This does not happen in all cases, however to address owner's concerns we asked that the modifier be used in all instances to insure that the driver would not get this noise. When replacing the fluid it is at the owner's discretion whether or not to add the modifier. Elimination of the modifier does not affect durability of the differential.
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iTrader: (2)
Joined: Feb 2004
Posts: 1,112
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From: rosemount,mn/windsor locks,ct
Originally Posted by Predator
That's strange, I always thought the additive was for the clutches in Eaton and Auburn limited slips.
Last edited by 99huggerorangeZ; Apr 4, 2006 at 12:48 AM.
Originally Posted by OctaneZ28
Some synthetic oils have the additive already in.
Like Royal Purple and Red Line... they already have the additive.
Like Royal Purple and Red Line... they already have the additive.
Mobil 1 also supposedldly has the additive in it
12 Second Club
Joined: Sep 2005
Posts: 4,273
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From: Bucks County, Pa.
Originally Posted by tici
We don't have all your brands over here 
The only rear end oil with additive I can find is what is used in BMW's and costs about $60 a gallon...
The only rear end oil with additive I can find is what is used in BMW's and costs about $60 a gallon...
