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Thread: No overdrive

  1. #1
    ff_jeff Guest

    No overdrive

    Well after a great cam install, ran into a snag. Transmission wont go into overdrive at all. We installed superior intermediate billet servo +35% over corvette. (1-2) and the Maximum Overdrive billet Servo. It has 50% more holding power than the stock overdrive servo. We had to have a superior tech walk us through the install, and it installed fine. They look a lot different than the stock setup. the 1-2, and 2,3 shift great. Just od doesnt ever shift. 70mph is like 3400rpms.
    Yall think its a install problem? Or a tune issue? Just wanting to get opinions until monday when Nelsons opens up. I was hopeing it just needs a tune adjustment. My previous tune had upped firmness, and tm %80 removed I think. I dunno but messing up the 4th servo install is kinda hard. It just goes inside the cover. Help please!!!

  2. #2
    Join Date
    Sep 2007
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    Might be from the servo install, I think you guys didn't put something back in correctly.

  3. #3
    Join Date
    Dec 2007
    Location
    wichita falls, tx
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    yeaah sounds like you didnt put the the overdrive part back on, its the small piece that goes on right before the cap
    ↓↓↓click pic to go to garage↓↓↓

    408, WCCHL92s, nelson tune,4L80e 3600 Circle D,
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  4. #4
    ff_jeff Guest
    Quote Originally Posted by banker099 View Post
    yeaah sounds like you didnt put the the overdrive part back on, its the small piece that goes on right before the cap
    I put the od servo in.

  5. #5
    Join Date
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    Unfortunately, it's not the tune, wish it was, it would be easy to fix.
    You can install those servos in a stock truck or tuned one and you should still have OD.

    I'd double check that servo install, maybe a seal or something?

  6. #6
    ff_jeff Guest
    Quote Originally Posted by farmtruc View Post
    Unfortunately, it's not the tune, wish it was, it would be easy to fix.
    You can install those servos in a stock truck or tuned one and you should still have OD.

    I'd double check that servo install, maybe a seal or something?
    thanx for chiming in allen. I guess, ill go and take them out and double check them again. This could have all been avoided if the darn things came with directions lol. BTW did kurt send the logs? It runs really nice Allen. Thanx man.

  7. #7
    Join Date
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    are you sure tyler didnt SOMEHOW have a hand in this install?
    1951 3100
    1984 C10

  8. #8
    Join Date
    Nov 2003
    Location
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    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  9. #9
    ff_jeff Guest
    It does. Greg is da man. tomarrow ill take them back out, I bet the 4th seal is backwards and is letting fluid by, like you said Greg.

  10. #10
    ff_jeff Guest
    Quote Originally Posted by Quik View Post
    i orginally did the shift kit and servos in my trans back in 06. i also didnt have OD. so i pulled trans out and had it rebuilt. i probably also did servo wrong but had someone help but im just saying it might be too late and might need a rebuild
    Better not be. It was fine before the cam swap. After the swap it never saw 4th gear. I hope not. But if its toast, just an excuse to fully build it.

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