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posi rear

This is a discussion on posi rear within the Firebird / WS6 forums, part of the Vehicle Specific category; do all 1998 trans am come with posi rears? thank you....

  1. #1
    now greybat66
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    navy blue metalic
    1998 trans am conv

    posi rear

    do all 1998 trans am come with posi rears? thank you.

  2. #2
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Quote Originally Posted by purplebat66 View Post
    do all 1998 trans am come with posi rears? thank you.
    Yep.

    Should be an auburn with yellow springs.

    If your having posi issues, then swap out the fluid/ add limited slip additive and try it out.

    Or live with a 1 wheel peeler till you upgrade like me

  3. #3
    now greybat66
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    navy blue metalic
    1998 trans am conv

    no its fine i was just curious and thank you so much.

  4. #4
    Member 99'CajunFirehawk157's Avatar
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    Bright Red
    99 Firehawk #157 Roadster

    Make sure if its an auburn unit do not put any synthetic fluid just dyno and for me 2 bottles of gm posi additive works best, IMHO.

  5. #5
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Quote Originally Posted by 99'CajunFirehawk157 View Post
    Make sure if its an auburn unit do not put any synthetic fluid just dino and for me 2 bottles of gm posi additive works best, IMHO.
    Why only dino???

  6. #6
    Member 99'CajunFirehawk157's Avatar
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    Bright Red
    99 Firehawk #157 Roadster

    Quote Originally Posted by JoshieDoom View Post
    Why only dino???
    Dunno, ask Auburn, something about the material they use, brass or bronze and compatibility issues...

    from the web:
    What kind of oil and additive should be used with an Auburn Performance Differential?It is important when installing
    an Auburn High Performance, Pro Series or ECTEDŽ LOCKER that a high quality non-synthetic 80W90 GL-5 gear oil
    be used. Treat the oil with Auburn Gear, GM or Ford friction additive. Three ounces of additive treats one quart of oil.
    Friction additive part numbers:
    Auburn Gear: 504102
    GM: 1052358
    Ford: C8A219B546A

  7. #7
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    Quote Originally Posted by 99'CajunFirehawk157 View Post
    Dunno, ask Auburn, something about the material they use, brass or bronze and compatibility issues...

    from the web:
    Good info.

    Mine has synthetic in it..., and it does 1 wheel peels...

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