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Transmission won't shift

Discussion in 'Chevy Trucks' started by 2COR517, May 10, 2010.

  1. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    1981 Chevy K20. TBI 350 from 90 Sub, TH350, NP205.

    I repaired a fuel line. Factory steel lines from the TBI down to the bellhousing. What a PITA to get those things in and out of there. Removed the coil and heater hose, but they were still tough.

    Now the transmission doesn't shift correctly. Take off from a stop in [D], it usually stays in first, sometimes shifts to second. If I takeoff from a stop in [1], I can shift up through manually. But it still doesn't feel "right".

    Any ideas?
     
  2. NICHOLS LANDSCA

    NICHOLS LANDSCA PlowSite Veteran
    Messages: 4,302

    Sounds like you knocked off, broke, or cracked the vac line to the tranny.
     
  3. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    I think the transmission vacuum is fine. The fluid is clean as a whistle.
     
  4. PDQ Pete

    PDQ Pete Senior Member
    Messages: 139

    I think there is a cable you can adjust. With the engine off you floor the gas pedel then pull up the clip on the cable. Been awhile not positve.
     
  5. quigleysiding

    quigleysiding PlowSite.com Addict
    Messages: 1,097

    Did you ever change that bearing on the exaust?:confused:
     
  6. quigleysiding

    quigleysiding PlowSite.com Addict
    Messages: 1,097

    Just kidding, You should check the passing gear kickdown and make sure it isn"t stuck or not adjusted right.
     
  7. 2COR517

    2COR517 PlowSite Fanatic
    Messages: 7,115

    Anyone, anyone? Bueller?