89 Gmc 4x4 Transmission Problems

By stewart14
March 19, 2011 in 1988-1999 Chevrolet & GMC C/K GMT400 Platform

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stewart14

Posted March 19, 2011

I have a 1989 GMC K-1500 w/700r4 tranny.It had been shifting fine & all of a sudden when I put it in gear it goes in hard and shifts up at alot higher speeds than before.There's no slipping,just higher shift points.Could this be the vehicle speed sensor or something internal?Any help would be appreciated.

GMstrong

Posted March 19, 2011

try adjusting the TV throttle valve cable.

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