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Thread: What gear oil in 2006 Chevy manual trans?

  1. #1
    Senior Member RACING JUNKIE
    Join Date
    Sep 2007

    What gear oil in 2006 Chevy manual trans?

    Trying to find info for my boss.

    2006 Chevy half ton short bed.5 speed manual trans. He wants to switch to full synthetic in the trans. What should he use?

  2. #2
    Senior Member EXPERT BUILDER gearhead1011's Avatar
    Join Date
    Jan 2004
    Shepherdsville, KY
    It looks like there are a few different manual transmissions that could be in that truck and they each require a different fluid. I don't think going to a full synthetic is a good idea. Synchronizers in a manual transmission depend on a certain amount of friction to function and synthetics sometimes interfere with that and cause shifting problems.

  3. #3
    NV3500/mg5 or a NV4500/mw3.....

    Prob 3500 which takes GM Syncromesh
    If by chance its the 4500= its a gm synthetic fluid part no.12346190

    IMO No real reason/benifit to stray from the factory fluid.

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