When driving 65 MPH or more transmission will not shift into fourth gear?

Sure, but have you run the codes to see what comes up? You can get a code scanner from Amazon for about $20.00.

Here is a guide/video to show you how:

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

Here is a scanner link:

https://amzn.to/3Qi1SS6

It could be a turbine revolution speed sensor that has gone out, here are the locations for both and how to replace them in case you need it in the images below. Also, it looks like the shift solenoids are replaced as a unit. Check out the diagrams (below). Let us know what happens and please upload pictures or videos of the problem.