DRIVING MY TRANSMISSION SHIFTS TO OVER DRIVE AT ...

1986 GMC Sierra

Tiny

Anonymous

October, 25, 2012 AT 9:30 PM

Driving my transmission shifts to over drive at 30mph and down shifts as soon as I let off gas. WHAT IS CAUSING THIS/

1 Answer

Tiny

hmac300

October, 26, 2012 AT 2:29 PM

Have a trans guy look at this, it may be a govenor stuck or a modulator depending on which trans. It can also be an internal trans problem like a valve.

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