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Buick trany shifts hard

Discussion in 'Other Rides' started by 66chev, Oct 18, 2006.

  1. 66chev

    66chev Registered Member

    Joined:
    Oct 3, 2005
    Posts:
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    Location:
    Great Falls, MT
    i wish i was asking questions about my old muscle car but not this time. I got a 91 buick century with the 3.3L motor and an auto trany. when it shifts from 3 to 2nd gear its violent and delayed sometimes. It has been getting worse for about a year now, it is still drivable and it is my daily driver. Im just wondering if you can have problems downshifting in only one gear like that or if i just worry to much. Should i sell the car before the trany quits on me.

    Thanks in advance
    levi
     
  2. Cricket

    Cricket 3/4 ton status

    Joined:
    Nov 29, 2004
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    Location:
    Colorado
    Assuming it's a TH350 Possibilities include:

    1. Vacuum Modulator - leaking vac line or stuck modulator

    2. Governor Malfunction or Circuit Blockage

    3. Faulty Detent Cable Adjustment

    4. Valve Body Malfunction.

    Check for detent cable adjustment and/or vacuum line to the vac modulator.
     

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