Transmission shifts into low on its own

2012 DODGE DURANGO
42,000 MILES • V8 • 4WD • AUTOMATIC
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CEBERN
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(Vehicle is the RT model)Then it is very difficult to get it out of low.I followed the instructions on the shifting to get it out of low gear but it takes along time.
This has been a Dodge problem for over 18 years.
Spent many days studying this can 't find a solution. So I disconnected the TCM . Need help. thank you.
May 17, 2019 at 9:11 AM
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STRAILER
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Hello,

It sounds like you have a weak input shaft speed or line sensor. We should run the codes to see what comes up.

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

Here are the sensor locations so you can see whats going on. Check out the diagrams (below). Please let us know what you find. We are interested to see what it is.

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May 18, 2019 at 11:53 AM