2500 dodge shifts hard when you go to stop when you take off it will shift after a high tack but not every day some days in don t do this at all?

I had a similar problem with my Ford F350 automatic transmission between 2nd & 3rd gears. The dealer said I needed a new transmission, which would've been covered by the warranty, but since I only had about 18,000 miles I thought that seemed unlikely.

A mechanic friend disconnected the battery for 10 minutes to reboot the truck's computer, and I never had a problem again. It's free to try this out and of course, can't hurt. Take care reconnecting the battery correctly, and note it's important to take the full 10 minutes to let it completely power down.

Might be a longshot but worth a try.