Transmission Fluid for 6MT
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2009-2014 Cadillac CTS-V General Discussion Discussion, Transmission Fluid for 6MT in Cadillac CTS-V Series Forum - 2009-2014; Just want to confirm this service manual I found is correct. It says the 6MT transmission takes 1.9 qts of ...
  1. #1
    spearfish25 is offline Cadillac Owners Enthusiast
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    Transmission Fluid for 6MT

    Just want to confirm this service manual I found is correct. It says the 6MT transmission takes 1.9 qts of GL5 75W90 gear oil. Is this right? Seems weird the transmission is using the same gear oil as the rear diff.

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  3. #2
    cruiser68 is offline Cadillac Owners Enthusiast
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    Re: Transmission Fluid for 6MT

    Well it is a gearbox

  4. #3
    M5eater's Avatar
    M5eater is offline Cadillac Owners Connoisseur
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    Re: Transmission Fluid for 6MT

    Completely wrong

    The tr6060 takes dexron III atf which no one (except gm) can actually produce anymore.

    Gm actually makes dex3 under what they call now manual transmission fluid( I still have 4-5 quarts)
    It's $8-12 iirc


    Definitively don't use gear oil.


    I'm looking to get rid of it, if you decide to. Buy some pm me.

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    thebigjimsho is offline Cadillac Owners 10000+ Posts
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    Yeah, what manuals are you looking at?


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  6. #5
    spearfish25 is offline Cadillac Owners Enthusiast
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    Re: Transmission Fluid for 6MT

    I have a pdf of a 2008-2009 CTS/V service manual (been shared by a member with a ton of other info on Google Drive). The problem is the PDF doesn't contain a table of contents so finding specific items is a biatch. I looked at the wrong transmission...it also lists an Aisin AY6 which takes gear oil. In another section there's the Tremec 6060 that lists 3.65 qts of GM part number 88861800.

  7. #6
    jb_bgg is offline Cadillac Owners Fanatic
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    Re: Transmission Fluid for 6MT

    GM also sells DEXIII in one gallon containers. Pick up one of those, you'll need nearly all of it.

  8. #7
    Torxila's Avatar
    Torxila is offline Cadillac Owners Enthusiast
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    Re: Transmission Fluid for 6MT

    Royal Purple Synchromax in mine.



    2010 Tremec TR6060 (MG9) 6/5/2009
    Type: Rear wheel drive, six-speed manual overdrive transmission
    Engine range: LSA super charged 555hp
    Maximum engine torque: 551 lb-ft ( 747 Nm )
    Maximum gearbox torque: 560 lb-ft ( 760 Nm )
    Gear ratios: MG9
    First: 2.660
    Second: 1.780
    Third: 1.300
    Fourth: 1.000
    Fifth: 0.800
    Sixth: 0.630
    Reverse: 2.900
    Final Drive Ratio: 3.730
    Maximum validated gross vehicle weight: 4255 lb ( 1930 kg )
    Case material: Aluminum
    Center distance: 85 mm
    Fluid type: Texaco ATF Type III 1863
    Transmission weight: Wet: 65.8 kg (145.1 lb )
    Fluid capacity (approximate): Dry: 3.8L +/- 0.06L (4.0 qt) 128 oz. +/- 2 oz, internal pump
    Power take off: No
    Applications: Cadillac CTS V

  9. #8
    spearfish25 is offline Cadillac Owners Enthusiast
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    Re: Transmission Fluid for 6MT

    I just bought a gallon of Amsoil Signature Series ATF. We'll see how that does.

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