Results 1 to 14 of 14

7.5" 10 bolt rear torsen fluid question.

This is a discussion on 7.5" 10 bolt rear torsen fluid question. within the Drivetrain forums, part of the LSx Technical Help Section category; OK, I had the funds for a Moser 9" for my 2002 SS. I was about a week away from ...

  1. #1
    Former Mopar Man 2002ssslp's Avatar
    Join Date
    Jun 2011
    Location
    Branchville, NJ
    Posts
    3,111

    Silver & Blue
    02 Camaro SS, 04 GTO

    Talking 7.5" 10 bolt rear torsen fluid question.

    OK, I had the funds for a Moser 9" for my 2002 SS. I was about a week away from ordering it when we got hit by the perfect storm. Kid's Tuition bills, Homeowners insurance and wife's medical bills hit the same week as mortgage. Oh Well, maybe next year. I have 31k on my Ss and do not want to put any money into the 10 bolt so I decided to put a TA girdle cover on the rear when I change my fluid next weekend. 159.00 plus fluid is ok since I can resell the girdle when the rear goes. My question is what is the best fluid to use with a Zexel Torsen diff. ? I would like to get the summer racing season out of the rear and swap it out over the winter. Thanks for the help. BTW, I run stock Goodyear F1 GS that came with the car.
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

  2. #2
    Senior Member INMY01TA's Avatar
    Join Date
    Jan 2006
    Location
    The great red state of MD.
    Posts
    5,755

    Black
    2001 Trans Am (sold)

    I've always used any 80/90 conventional gear oil + 1 bottle GM limited slip additive.

  3. #3
    Senior Member cpop98ws6's Avatar
    Join Date
    May 2010
    Location
    Wilkes-Barre, PA
    Posts
    1,545

    Black/Black
    98 WS6/04 Sierra Dmax

    ^^ That is what I ran when I had the 10 bolt in the car.

  4. #4
    Senior Member INMY01TA's Avatar
    Join Date
    Jan 2006
    Location
    The great red state of MD.
    Posts
    5,755

    Black
    2001 Trans Am (sold)

    Quote Originally Posted by cpop98ws6 View Post
    ^^ That is what I ran when I had the 10 bolt in the car.
    That's all I use in my 12 bolt too.

  5. #5
    Senior Member cpop98ws6's Avatar
    Join Date
    May 2010
    Location
    Wilkes-Barre, PA
    Posts
    1,545

    Black/Black
    98 WS6/04 Sierra Dmax

    Just straight 80/90 in my S60, no need for the additive with the Detroit Truetrac

  6. #6
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    Tried to swap my Valvoline out for Amsoil a few weeks ago and the damn drain plug is seized in the aluminum cover... again!

  7. #7
    Senior Member Too Fast's Avatar
    Join Date
    Nov 2006
    Location
    Indianapolis
    Age
    54
    Posts
    5,170

    Black
    2000 WS6 6spd Hooker LT

    ^^^but for the F-bodies, it was synthetic 75w90 for the V8 cars, and possibly the V6, as specified in the owners manual. I've never read anything absolute about having to use the additive for Torsens, but it won't hurt any differential it to use it if it's not needed. That's what I've always run in my Torsen equipped car, with a TA girdle and welded axle tubes. 113k and no noise or problems whatsoever, lots of trips at the drag strip too. I've had many 2.0x 60 ft times, some 1.9x, but then again I've never ran slicks or ET streets either.

  8. #8
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    Quote straight from Torsen's site:

    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.

  9. #9
    Senior Member INMY01TA's Avatar
    Join Date
    Jan 2006
    Location
    The great red state of MD.
    Posts
    5,755

    Black
    2001 Trans Am (sold)

    If I remember correctly I tried using the Redline synthetic shockproof gear oil in my 10 bolt a long time ago and started getting one wheel peels.

  10. #10
    Super Moderator
    pajeff02's Avatar
    Join Date
    Feb 2009
    Location
    Mansfield, PA
    Posts
    21,576

    Black & Blue
    '02 WS.6 / '07 Suburban

    I run Redline in our Corvette rear and have had no issues with the posi. Seems that the synthetic stuff will mostly work without an additive, but if you experience any chatter the fix is to dump some in.

  11. #11
    Junior Member
    Join Date
    Jan 2012
    Location
    Hawaii
    Posts
    95

    2001 CAMARO SS / Black
    2009 COLORADO V8/dk gray

    I had a case of the "rusty screw", replaced the RP oil with syn racing diff oil and additive. Noise is still there, sometimes. 41K on the odo. Do I have a problem? I also read a lot about going to 12 bolts or 9" etc. The $ is high and as I was reminded, the shipping might really bite. So, I also read about just replacing the diff with an aftermarket set up. Any recommendations? The shipping to here might be less painful for only a diff. Plus, I don't race so a 12 or 9 might be overkill for me..Yes/No?? Thanks!!

  12. #12
    Senior Member Too Fast's Avatar
    Join Date
    Nov 2006
    Location
    Indianapolis
    Age
    54
    Posts
    5,170

    Black
    2000 WS6 6spd Hooker LT

    The rusty screw is only a minor noise issue, from what I've gathered. It doesn't mean you're having catastrophic failure, so unless you just have money to spend, I wouldn't worry about it. You can always do a drain and refill again, are you using synthetic diff oil like the owner's manual wants?

  13. #13
    Junior Member
    Join Date
    Jan 2012
    Location
    Hawaii
    Posts
    95

    2001 CAMARO SS / Black
    2009 COLORADO V8/dk gray

    Quote Originally Posted by Too Fast View Post
    The rusty screw is only a minor noise issue, from what I've gathered. It doesn't mean you're having catastrophic failure, so unless you just have money to spend, I wouldn't worry about it. You can always do a drain and refill again, are you using synthetic diff oil like the owner's manual wants?
    Yes, it's a synthetic diff oil that a buddy uses for his race car, plus the additive. I was hoping that it was just an annoyance. I've even read about a guy double-dosing the additive with good results. I guess it wouldn't hurt. Thanks for the reply

  14. #14
    Senior Member Too Fast's Avatar
    Join Date
    Nov 2006
    Location
    Indianapolis
    Age
    54
    Posts
    5,170

    Black
    2000 WS6 6spd Hooker LT

    ^^^Yes try the double dose. I always say, if you like one dose, do another!

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 10 bolt rear end cover question?
    By 02blckws6 in forum Drivetrain
    Replies: 13
    Last Post: 07-29-2010, 03:43 PM
  2. Rear End Fluid for a Moser 9"
    By ls1camino in forum Drivetrain
    Replies: 5
    Last Post: 02-06-2009, 12:10 PM
  3. WANTED Torsen Paddle and Bolt
    By Vortec350s10 in forum Parts Wanted / Trade
    Replies: 0
    Last Post: 11-28-2008, 07:03 PM
  4. 10 bolt Torsen carrier with 3.42's
    By BKDZ28 in forum Parts Wanted / Trade
    Replies: 4
    Last Post: 11-28-2008, 12:22 PM
  5. 9" or 12 bolt rear end
    By dave l in forum Parts Wanted / Trade
    Replies: 0
    Last Post: 04-19-2007, 08:56 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •