Durango Shift Improvement?

I have a couple of 1st gen Durangos...an 01' 4.7L 4x4 & a '02 R/T. What can I do to firm up the shifts? I hate the slushy shifts they both have. Not looking for real hard slam type shifts from a shift kit, but definitely want to firm them both up, if I can. Thanks in advance!

I may be wrong, but I think the only way to change the shift on a 545RFE is to use a Diablo tuner, or something like that. You plug that thing into the OBDII connector under the dash, and follow the onscreen prompts to get to where you want to go.

https://transgo.com/product-details/rfe-reprogramming-kit/

Thanks much