wont shift on 1990 Chevrolet Suburban 1500

my truck wont shift until the gears wind completly out i dont know what it is help me!! call me 5033121161

by in Portland, OR on December 25, 2009
2 answers
ANSWER by on December 25, 2009
It sounds like your kick down cable or Throttle Pressure Valve is stuck in the power position. Check to see if there is a vacuum line to your trans, if there is then make sure it is on correctly. Also take it off and make sure no fluid comes out, that is a sign that the Vacuum Transducer is broken and needs replacing. If no vacuum line, then make sure that the kick down cable works well, it is a cable that goes to your throttle body next to the throttle cable but it goes down to the trans. It should operate SMOOTHLY when you pull it. Best of Luck!
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ANSWER by on June 27, 2013
Try cleaning your MAF (mass airflow filter). I found this to be an issue where my vehicle would not shift up while accellorating or trying to pass. It would wind out and I would have to take my foot off of the gas to get it to shift. A dirty MAF also caused hesitation at take off.
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