Transmission shifting hard

Hello,

If the engine has low vacuum to will cause the transmission to shift late and hard. The main cause for this condition is a plugged catalytic converter. The TOD light will be on as well becasue the computer sees that it is not going into overdrive.

Here is a guide that will help you confirm the problem.

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Please let us know what you find.

Cheers, Ken