The speedometer is this vehicle is reading much higher than the vehicle is actually travelling, say if I'm driving 45mph the speedometer actually reads 80mph. At 70 mph the speedometer is reading 120 mph. Also, the odometer is adding more miles to the vehicle than what's actually driven. For example, if I drive 2/10 of a mile, the odometer has acutally added 3/10's.
Looking for ideas on what the problem may be, thanks!