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Rear end fluid change. Limited slip additive ?'s

This is a discussion on Rear end fluid change. Limited slip additive ?'s within the General Help forums, part of the LSx Technical Help Section category; I did a rear end fluid change on my 2000 SS which now has 58K on it. I hadn't done ...

  1. #1
    Junior Member
    Join Date
    Jun 2006
    Pocatello, ID

    2000 SS Camaro

    Rear end fluid change. Limited slip additive ?'s

    I did a rear end fluid change on my 2000 SS which now has 58K on it. I hadn't done one in about 35K miles and the fluid looked just fine. I put in what I always put in mobile 1 75/90. used a new gasket yadda yadda yadda but my real question is GM additive 89021958 is what was sold to me at the dealership when I asked for limited slip additive. This crap was like $19! and it looked different then what i used last time which I think was part # 1052358. The guy at the counter said that this was the new part number and it replaced the old one. Anways I dumped it all in (I think 4 ounces) and now I am reading that is a concentrate and you are only supposed to use like 1 ounce or something like that and its for a GTO or something. I have not drove it more than maybe 2 miles and everything sounded ok but whats the story here. Did I screw up and use the wrong stuff? Is the guy from the GM dealership full of crap? I am going to have problems? Doing this kind of work is a PITA cause I live in a apartment and I do not want to change out new fluid but if I need to I will. This did not look like the usual whale sperm lol that I had been getting from GM but instead it looks like a green dye of some kind and it seems pretty runny and not thick. Any thoughts?

  2. #2
    Veteran Hi-Po's Avatar
    Join Date
    Nov 2005

    1999 TA WS.6

    It is very expensive stuff buying it from the dealership. Your supposed to put all of it in. Chinazone has it cheaper. Your fine

  3. #3
    nut butter Poppn's Avatar
    Join Date
    Apr 2008

    1999 Camaro SS

    As far as I know, the 99 and up cars have a Torsen differential which doesn't require an additive, but it doesn't hurt to add it.

    This is straight from install university:

    You need to fill the rear differential with the fluid. The housing will take approximately (two) 2 quarts of fluid. As we stated at the top of the install document we used the GM additive but there is no need to do this in a Torsen unit.

  4. #4
    Slow'er'Ass Mr. Luos's Avatar
    Join Date
    Aug 2005
    Thornton, CO

    Red Tint Jewelcoat
    2008 Trailblazer SS

    Quote Originally Posted by Hi-Po View Post
    It is very expensive stuff buying it from the dealership. Your supposed to put all of it in. Chinazone has it cheaper. Your fine
    It actually isn't too bad....
    Not the price it should be, but it isn't as bad as some things the stealership sells.

  5. #5
    Retired NOT tired SteveC's Avatar
    Join Date
    Jul 2005
    Poway, Ca

    2001 Z28 (Sara)

    Jeg's has its version of the GM additive for alot less.


  6. #6
    Join Date
    Nov 2008
    harrisburg pa.

    02 vette vert

    GM part#1052358-$7.99-WS6 Store

  7. #7
    Member 98Hardtop's Avatar
    Join Date
    Jul 2009
    Richmond Va

    1998 Camaro Z/28

    Yep, if you have the Torsen, no need for the additive.

    09 Vulcan 900 custom.
    2007 Subaru Legacy 2.5i
    1998 Z/28 Hardtop A4 | Y2K wheels | SLP Lid | Magnaflow catback |cutout | Hotchkis LCA'S/PHB | BMR TA and D/S Loop| Tuned by Frost....300rwhp/308rwtq

    97 Cobra- bolt ons | full exhaust| 4.30's| suspension | SCT tune- sold!

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