Bought a transgo shiftkit to try n help out some of the long/hard shifting that my 4t65e has been experiencing. Got it and was just reading over instructions before tearing into here in a couple days. Few questions....

1- the kit has tips that says to replace pressure control solenoid and the needle bearings. How necessary is this?

2- it includes a special seal for people having problems with no reverse or trouble with the reverse slipping when it's cold. I'm not having this trouble, should i put this new seal in anyways?

3- it says to replace the rings on the (input drum?) Is this necessary?

I have never done anything like this but it seems pretty do able. I just don't want to screw anything up so any other thoughts/ advice would be much appreciated! Thanks!