The transmission works like when original. The supposedly heavy duty parts have no effect on what you feel when driving. Who knows what I really got. The only thing that worries me is not being able to feel the shift between Park and Drive. I'm not sure if there is a long term negative effect. I mentioned it to the Trans Tech and he got in the truck and said it was fine. I repeated to him that when I purchased the truck NEW there was a normal natural shifting feeling from P to Drive. He said not to worry. If anyone here can give me advise or an explanation on the shifting I will appreciate it