1986 Gmc Sierra Driving Transmission Shifts Over Drive 30mph Down Soon Let Off

1986 GMC SIERRA
129,000 MILES
Avatar
ANONYMOUS
  • MEMBER
  • 1 POST
Driving my transmission shifts to over drive at 30mph and down shifts as soon as I let off gas. WHAT IS CAUSING THIS/
Oct 25, 2012 at 9:30 PM
Advertisement
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.