Speedometer quit and now it transmission will not change gears?

Tiny
SHARON 42
  • MEMBER
  • 1999 DODGE CARAVAN
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
I have a van th speedometer quit and now it wont change gears?
Wednesday, December 16th, 2009 AT 6:16 PM

1 Reply

Tiny
SQM
  • MECHANIC
  • 6,383 POSTS
Hello,

First you need to check the vehicle speed sensor. It is located on the transmission (see diagram below).
This sends the signal of the vehicle speed to the ECM and having a faulty sensor the ECM will not received the required data, which can prevent the vehicle from shifting.

https://youtu.be/f3bETtCIdxM

I have attached diagrams for your reference.

Please let me know of any questions.
Thank you.
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Thursday, September 2nd, 2021 AT 12:01 PM

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