1994 Other Oldsmobile Models Speedometer goes crazy and car

Tiny
MECHDESIGNER
  • MEMBER
  • 1994 OLDSMOBILE
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 225,000 MILES
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.
Saturday, August 14th, 2010 AT 3:21 PM

1 Reply

Tiny
MHPAUTOS
  • 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)
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Saturday, August 14th, 2010 AT 7:55 PM

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