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Transmission shift from high gear

Tiny
TDS5888
  • MEMBER
  • 2003 DODGE NEON
  • 2.0L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 168,000 MILES
Transmission will shift from overdrive to third gear automatically for a brief moment before dropping back to overdrive. It does this about every ten seconds or so. No vacuum leaks detected, fluid level good, shifts good until about fifty mph when this happens.
Any help is appreciated.
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Sunday, October 15th, 2017 AT 2:01 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,512 POSTS
It sounds like you have a shaft speed sensor that is going out in the transmission is the check engine light on? These sensors may or may not trigger a check engine light. Lets runs the codes so it will give us a clue whats going on.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

If the transmission speed sensor codes comes up here is a video of one being replaced so you can get an idea of what to do.

https://youtu.be/f3bETtCIdxM

Please let us know what happens.

Cheers, Ken
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Wednesday, February 24th, 2021 AT 2:18 PM

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