C4 Trans + Stall always feels like its in Low Gear

Discussion in 'Transmissions' started by wdmshmo, Oct 12, 2010.

  1. wdmshmo

    wdmshmo New Member

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    So I posted this a while back, my transmission felt like it had no third gear just days after the mechanic rebuilt it, and after many fixes I'm having some issues.

    This was my previous post:
    http://mmb.maverick.to/showthread.php?p=706568&posted=1#post706568

    But now when I drive the car, I shift it into Drive 2, first notch below neutral.
    It has plenty of power and will spin the tires to 35 if I want to, however, I feel like after 35 mph the car is always in low, sort of chugging back down and not wanting to coast.

    So a normal 0 - 70 would be like this for me,
    Start easy on the gas, you feel the first shift fine, get it up to about 35 and you can no longer coast. 35-70 it feels like its in low gear.
    Then when i let off the gas at 70, the transmission shifts and coasts well for a few seconds. But if I give it some gas again, it feels like it goes back into low gear.

    My mechanic says he's having trouble getting it to stay in the gear it should be in, what can I suggest to him?
     
  2. PaulS

    PaulS Member extrordiare

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    A new career.
    Have him check manifold vacuum going to the modulator. It has to be at least 10 inches of mercury.
    Have him check the governor to make sure the spools are in correctly and free to move. Have him check the steel rings that seal the governor distribution sleave.
    Have him air check the direct clutch for proper operation (unless reverse works fine), If reverse works then the direct clutch is functioning.
     
  3. ptpdub

    ptpdub Member

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    dear Paul S. please get on a plane and fly to my house to help me figure out my transmission. thank you very much.
    Peter.
     
  4. PaulS

    PaulS Member extrordiare

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    Well, I am waiting for the tickets...... and you will of course cover the freight for my tools as well, right? :)
     
  5. wdmshmo

    wdmshmo New Member

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    Reverse does work fine, its really bugging me that the guy said he could do this for me, then botched it. I would go to someone else but he has to fix this on his own accord, but not having my car is the worst. Its so tempting to take it somewhere else.
     
  6. ptpdub

    ptpdub Member

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    "that's right, Son. we wont be having any Christmas gifts this year. we don't need gifts every year, right! by the way, have you ever felt a c4 with a shift kit shift? son.... son.... why are you crying?"
     
  7. wdmshmo

    wdmshmo New Member

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    My mechanic is telling me that this is a linkage issue, and that I need a new shifter put in. This car was originally a column shift, but I couldn't fit headers with the column shifter, so I swapped in a pretty basic floor shift.

    When I put floor shifter in, everything had been running fine. There were no issues I noticed, why would third gear not work because of a shifter/linkage?
     
  8. PaulS

    PaulS Member extrordiare

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    Tell your mechanic that if a new shifter doesn't fix it the he pays for it not you. Get it in writing because he is guessing and is probably wrong.
     
  9. dkstuck

    dkstuck Member

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    Have mr shade-tree unhook shifter, put tranny in drive, go for road test. That will show if shifter is bad or out of adjustment.
     
  10. d2willys

    d2willys New Member

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    It sounds as if the transmission does shift to second, but not to third. If this is correct, then something is keeping the second gear band is applied and not releasing at the third gear shift. Start with the modulator and it's plumbing. Then check the governor and valve body for any problems. One other thing, is the kickdown linkage adjusted correctly, IOW's is the kickdown not causing the transmission to stay in kickdown position. I am thinking that the release port of the 2nd gear band servo is not functioning correctly.
     
  11. Mercurycruizers

    Mercurycruizers David (Coop) Cooper

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    Hey, PaulS! Remember when you built my new tranny, you had to change the plate to attach my shifter linkage, cause I have a floor shift. You had put it together for a column shift car... Could this be the problem?
     
  12. PaulS

    PaulS Member extrordiare

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    NO, if the wrong lever was used the shifter would just lock up at one end or the other and not move because of the angle of the manual lever on the transmission. Also, the shift pattern would be reversed - Park would be all the way to the rear and Low would be forward.
     

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