1999 Mercury Sable overdrive

1999 MERCURY SABLE
127,000 MILES • 6 CYL • FWD • AUTOMATIC
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DILLON65
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just wandering why car will not shift into overdrive. also speedometer dosnot work could this be problem
Jun 18, 2009 at 9:16 AM
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JGAROFALO
  • ✓ASE Certified Mechanic
  • 489 POSTS
  • ASE Certified Mechanic
[quote:58b552b64d="dillon65"]Transmission problem
1999 Mercury Sable 6 cyl Front Wheel Drive Automatic 127000 miles

just wandering why car will not shift into overdrive. also speedometer dosnot work could this be problem[/quote:58b552b64d]

YES!
When you have speedometer AND shifting problems together, it is a sure indication of a bad speed sensor. I recommend that you have it checked for trouble codes, and service accordingly.
Jun 20, 2009 at 7:46 PM
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