won't up shift unless at full throttle?

1999 DODGE CARAVAN
148,000 MILES • 6 CYL • FWD • AUTOMATIC
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2KENWORTH
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1999 dodge caravan 148 k miles transmission won't up shift unless at full throttle then it shifts normally. problem started suddenly had been working ok. it has no diganostic codes set. trans fluid is clean and doesn't smell burnt
Dec 13, 2007 at 1:13 PM
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2CARPRO JACK
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normally for being floored? Sounds like it could be a governor stuck. Does that trans have the throttle pressure linkage from engine to trans?
Dec 13, 2007 at 6:45 PM
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STRAILER
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I would run the codes because it sounds like you have an input shaft speed sensor that needs to be replaced. This guide can help and I have included the input shaft speed sensor in case you need it and acode cis stored for it.

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

If the speedometer is not working the output shaft speed sensor needs replacement. Check out the images (below). Let us know what you find.


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Sep 10, 2024 at 6:01 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.