1989 Ford Thunderbird speedometer

Tiny
HANDYDANDY
  • MEMBER
  • 1989 FORD THUNDERBIRD
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 86,000 MILES
Speedo wavers 5-10 kph at highway speeds, less erreatic at lower speeds. Trans shifts normal
Friday, July 23rd, 2010 AT 4:11 PM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Do you have the electronic instrument panel or the basic style? If basic then it should have a speedo cable which is probably getting kinked up. If it's electronic then the vehicle speed sensor (VSS) drive gear (where sensor connects to tranny) may have some damaged teeth.
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Friday, July 23rd, 2010 AT 6:56 PM

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