When coming to a stop and letting off the brake there is a loud clunk if you will and sounds and feels like the underneath shifts forward and then letting off the brake shifts backwards. Transmission shifts smoothly and quietly.
Possible worn engine/trans mounts.
If it happens in reverse too, it’s probably a ventilation system part like a blend door or some other one. My GMC does it all the time and it doesn’t bother me one bit.
You might want to check for worn lower ball joints.
Tester