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changing posi lube

This is a discussion on changing posi lube within the Drivetrain forums, part of the LSx Technical Help Section category; going to do a flush of posi unit,son works at a mobil kwik lube, and hes suggesting removal of all ...

  1. #1
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    red/black
    97 Firebird

    changing posi lube

    going to do a flush of posi unit,son works at a mobil kwik lube,
    and hes suggesting removal of all old lube and replacement with mobil synthetic gear lube.
    Do I need to add GM posi additive?
    rear has about 60 K on it now and posi unit acts just fine.

  2. #2
    Here for entertainment 502ci's Avatar
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    black
    97 6-speed corvette

    Does the mobil synthetic say it has a limited slip additive? If not you must add it.

  3. #3
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    red/black
    97 Firebird

    dont know will check and see.
    Since this is a store that is franchised by Mobil I would think
    they know but i do know that some reports in past of using
    conventional hipo gear oil has said it didnt need additive but in fact
    GM posis did act up and cleared right up with one or 2 bottles fo supplement.

  4. #4
    Member keliente's Avatar
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    99 Firebird Formula

    Yes you will need the additive no matter what fluid you choose.

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