I've never had a problem with my trans but today I drove about 100 miles one way and did what I had to do then left. On the way back the whole way almost when I would come to a stop the tranny would hit hard and bang into first. Any idea whats wrong? It felt like the torque converter locking up really hard.also I want a new torque and maybe a clutch pack what is good for the mods I have done to my truck. Thanks