1994 Other Oldsmobile Models Speedometer goes crazy and car

1994 OLDSMOBILE
225,000 MILES • 6 CYL • FWD • AUTOMATIC
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MECHDESIGNER
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  • 1 POST
Car starts and runs fine. Then just a few miles or less up the road, the speedometer drops to 5 or 10 mph (while the car is still going 50 - 60 mph). The transmission down shifts as if the car were going much slower. You wind up going down the road at city speeds 45 - 50 mph while the motor is spinning at 3000+ rpm. I've already replaced the transmission speed sensor. I was sure that was the problem, but not so.
Aug 14, 2010 at 8:21 AM
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MHPAUTOS
  • ✓Experienced Mechanic
  • 31,937 POSTS
Hi there,

Thank you for the donation,

I would have suggested the same, so as that has not cured the problem, have you done a scan as yet to see if there are any unresolved fault codes, not all faults will set a MIL.

mark (mhpautos)
Aug 14, 2010 at 12:55 PM
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