Transmission does not engage drive?

Hi,

The idea that it hit first hard and then this happened leads me to think there is an issue with the transmission line pressure. By any chance, does the check engine light stay on when the engine is running? If it does, I recommend having the computers scanned for diagnostic trouble codes.

Here is a link that explains how it's done:

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Next, there were problems with the transmission cooler getting plugged and restricting line pressure. Has the transmission ever been serviced? If it was, was the cooler flushed?

Take a look at the service bulletin below.

Let me know your thoughts and as much info as you can think of. For example, is the fluid clean, full, and without a burnt smell?

Take care,

Joe

See pic below.