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Driving my transmission shifts to over drive at.
1986 GMC SIERRA
Driving my transmission shifts to over drive at 30mph and down shifts as soon as I let off gas. WHAT IS CAUSING THIS/
Thursday, October 25th, 2012 AT 9:30 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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Friday, October 26th, 2012 AT 2:29 PM
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