Transmission hard shifts when warm

Good afternoon,

This sounds like an issue with the valve body. There may be a weak or broken spring in the valve body.

https://www.2carpros.com/articles/automatic-transmission-problems

Are there any codes in the system?

How long since you changed the filter and fluid?

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Roy

Okay, thank you. I will read trouble codes. What is a good trouble code reader scanner to buy to have in the tool box?

You can get a cheap one at a parts store for under $50.00 or you can have them read it for you for free.

Roy

Okay, thanks. like to have a good one in the tool box. Any recommendations?

Okay, I attached 4 of them for you. They run from cheap to one that does live data including ABS. I like that one but a little price. I do not know your budget but look them over.

My favorite tool store has them in stock. Harbor Freight.

Roy

Okay, thanks. Great advice.

You are welcome.

Always glad to help.

Roy