Speedometer stopped working mid-drive then after stopping at stop light car would not shift out of first gear

Tiny
KELLY L CLARK
  • MEMBER
  • 1995 CHRYSLER LHS
  • V6
  • AUTOMATIC
  • 160,000 MILES
We were driving like normal, had it in cruise control, when suddenly the speedometer went down. It fluttered back on and off a few times, but eventually shut off completely. Actual driving wasn’t hindered while this was happening. When we were forced to stop at a stoplight it didn’t come back on and we were stuck in 1st gear for the rest of the drive. Tachometer still works, gas gauge still works, but the indicator for what gear it was in wouldn’t light up either.

Check engine light only came on for a minute or so at the end of the drive (probably because the engine was starting to heat up due to not being able to shift up gears) and turned off after letting the car rest for a while before checking it out.

Checked transmission fluid, looks good.

Looking up stuff online and calling a mechanic seems like it’s a speed sensor (output speed sensor specifically). Does that sound correct? How would someone go about pinpointing and diagnosing it?

And how easily is it fixed? Could any auto repeat mechanic do the job justice?
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Monday, June 14th, 2021 AT 11:01 AM

1 Reply

Tiny
JOE F
  • EXPERT
Hi,

The idea that the speedometer isn't working and the transmission isn't shifting properly, the output speed sensor is very likely the problem.

There should be a code related to the issue. That could help me determine what needs to be checked.

As far as the speed sensor, it is really an easy repair. It is on the outside of the transmission. All that is done is to disconnect the electrical connector, screw it out, and then install the new one.

If you look at the pics below, I attached the directions for removal and replacement. Also, pic 1 shows the location. It is right next to the shift lever on the transmission. You could replace it yourself.

Let me know if you have other questions or if there is something I can do to help.

Take care,

Joe

See pics below.
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Monday, June 14th, 2021 AT 9:29 PM

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