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Thread: servo

  1. #11
    Join Date
    Nov 2003
    Location
    Denton Texas
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    20,540
    The PN of the parts currently inside the 2007 GMT900 4L60e trans is...

    Cap 8642485
    4th apply piston 8642482
    Piston 8642553 and approximately 2.280 diameter
    out cylinder that fits on the piston 8642466

    not sure on the size of a Corvette servo piston. Anyone have one they bought and haven't installed yet?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #12
    Join Date
    May 2008
    Location
    Crowder, OK
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    8,005
    Wait, you have a 2009 with a 4l60?

    1969 Chevy RCLB C10 350/TH400 SOLD
    2007 Chevy RCSB 4.8 4x4 LS SOLD
    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


  3. #13
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    my 2007 GMT900 had a 60e. Not a 65 or 70 but a 60. Your's may too. Look on the side of the trans and see if M30 is cast on it. Look in the RPO code list in the glove box.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  4. #14
    Join Date
    Dec 2006
    Location
    Bloomingdale Illinois
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    287
    Quote Originally Posted by KeJessie View Post
    so is the vette servo we talk about for our trucks the exact same as the stock gm peice out of the corvette? if so what years or even part number would it be?
    Quote Originally Posted by RedHeartbeat View Post
    The PN of the parts currently inside the 2007 GMT900 4L60e trans is...

    Cap 8642485
    4th apply piston 8642482
    Piston 8642553 and approximately 2.280 diameter
    out cylinder that fits on the piston 8642466

    not sure on the size of a Corvette servo piston. Anyone have one they bought and haven't installed yet?

    Red the numbers on the actual piston and cover are production numbers. Not the part numbers. This is a misconception often found in the industry so I wanted to point it out.

    Here is the number for the vet servo assembly. Vince

    gm # 8642079 for the piston and 8673039 is for the cover.

  5. #15
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Hey Vince, can you measure one of the Vette servo pistons and post what the diameter is so they can tell if the one stock in their transmission is the same as the Corvette servo or not?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #16
    Join Date
    Aug 2007
    Posts
    1,105
    i thought the servos looked different than what this pic shows on this site
    2009 CHEVROLET 1500 with a MONSTER 4.8 between the frame rails!!

    Tuned by LSX Powersports ~ 4.10 ~ JBA Shorties ~ 4" Inlet/Outlet Spintech ~ Airaid Coldair
    CST 3.5" Spindles ~ Camburg Upper Control Arms ~ 2.5" CCM ~ FFR Tie Rods
    Full Throttle Suspension 3" Lift Blocks ~ Soft 8s wrapped in LT285/70/17 Silent Armors

  7. #17
    Join Date
    Aug 2007
    Posts
    1,105
    2009 CHEVROLET 1500 with a MONSTER 4.8 between the frame rails!!

    Tuned by LSX Powersports ~ 4.10 ~ JBA Shorties ~ 4" Inlet/Outlet Spintech ~ Airaid Coldair
    CST 3.5" Spindles ~ Camburg Upper Control Arms ~ 2.5" CCM ~ FFR Tie Rods
    Full Throttle Suspension 3" Lift Blocks ~ Soft 8s wrapped in LT285/70/17 Silent Armors

  8. #18
    Join Date
    Dec 2003
    Location
    Azle,TX
    Posts
    3,682
    Hows the the tune? I need to retune for the servo when you get it in....so holla!

  9. #19
    Join Date
    Aug 2007
    Posts
    1,105
    great! soften the shifts or what? and welcome back.
    2009 CHEVROLET 1500 with a MONSTER 4.8 between the frame rails!!

    Tuned by LSX Powersports ~ 4.10 ~ JBA Shorties ~ 4" Inlet/Outlet Spintech ~ Airaid Coldair
    CST 3.5" Spindles ~ Camburg Upper Control Arms ~ 2.5" CCM ~ FFR Tie Rods
    Full Throttle Suspension 3" Lift Blocks ~ Soft 8s wrapped in LT285/70/17 Silent Armors

  10. #20
    Join Date
    Dec 2003
    Location
    Azle,TX
    Posts
    3,682
    Yeah...lets see how it shifts and go from there...I may want to make some pressure changes as well.

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