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Tranny wont downshift speedometer,tachometer, odometer dont work

Stopped at the gas station everything worked, came out speed and tach did not work. shift indicator and odometer did not work. pulled away truck started out in high gear does not down shift on own.

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My speed on my dash went out so as the rpm but my gas and other thing works, what could be the problem how do i fix ?


If both the speedometer and Tach quit working there is a high probability that the instrument cluster has checked out. The speedometer takes it's signal from the VSS (vehicle speed sensor) via the computer, and the tach comes from either the distributor or coils (tach pin) to the tachometer. Both these items would have to go out to cause your symptoms.

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May 16, 2012 | 1995 Buick Regal

1 Answer

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I dont think your problem is related to the intake manifold gasket.My experiance leads me to believe that your speed sensor is bad(VSS) Back in the day it was a cable attached to the tranny that gave you mph on your dash.In today's "fly by wire" society this would be the most likely suspect.symtoms would include downshifting for no reason your speedometer would drop to 0 and the tach would skyrocket.Vehicle may come right out of it and operate normally,or it may continue to buck for a while and then even out.I would start there.

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1 Answer

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1 Answer

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1 Answer

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1 Answer

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1 Answer

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1 Answer

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