Intermittently while driving odometer and speedometer turn off and transmission shifts hard

This is most likely going to be an issue with the vehicle speed sensor issue.

The speed sensor is used for the odometer and the speedometer then also for calculating the shift points.

The way we can test this is to find out what the signal to the cluster is when this acts up.

I suspect you will find that the signal is dropping out or goes erratic. Here is a guide that will help with this testing:

https://www.2carpros.com/articles/how-to-check-wiring

However, if the signal does not alter when this happens then the issue is going to be in the cluster.

Please run through this info and let us know what you find.

Thanks