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Thread: 4L60E Shifts REALLY hard...

  1. #1
    Join Date
    Jan 2009
    Posts
    24

    4L60E Shifts REALLY hard...

    Hey all,

    The truck is a 1999 ECSB 4WD 5.3. It seems to shift at the correct points, but it really bangs the gears when it does...all of them. It happens when shifting from park into drive or reverse. It does it from first to second and second to third as well...not as noticeable into 4th.

    I'm not much good with automatics. Line pressure solenoid maybe? (I think they call it the EPC...or maybe that's something else?)

    Anyone else already fix this problem?


    Thanks,
    Jake

  2. #2
    Join Date
    Jan 2008
    Posts
    1,560
    How long have u owned the truck? Maybe previous owner installed a shift kit

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  3. #3
    Join Date
    Jan 2009
    Posts
    24
    Nope. PO was a drunken Indian.* (This truck came off the rez so it's in pretty rough shape...not a bunch of aftermarketcrap on it though, so in that respect, it's relatively unmolested.)


    Jake


    *I can say this because I'm part drunken Indian myself.

  4. #4
    Join Date
    Jan 2008
    Posts
    1,560
    Hmm ok well I'll talk to my transmission guy and see what he says. Hopefuly someone who had this problem will chime in

    04 RCSB 5.3, Homemade 80mm FM, TU1, TH400

  5. #5
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,689
    a bad TPS will cause this issue but you normally get a SES code.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  6. #6
    Join Date
    Jul 2010
    Posts
    1
    4L60E transmissions
    Quote Originally Posted by Jake Harsha View Post
    Hey all,

    The truck is a 1999 ECSB 4WD 5.3. It seems to shift at the correct points, but it really bangs the gears when it does...all of them. It happens when shifting from park into drive or reverse. It does it from first to second and second to third as well...not as noticeable into 4th.

    I'm not much good with automatics. Line pressure solenoid maybe? (I think they call it the EPC...or maybe that's something else?)

    Anyone else already fix this problem?


    Thanks,
    Jake
    I suggest that you have to look for the real problem maybe the valvebody is not correct.
    Last edited by venomouse; 08-04-2010 at 02:00 AM.

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