When u put my truck in reverse or drive sometimes it will kick hard before going in gear. It's really annoying. It doesn't do it all the time so I know it's not suppose to do it I just don't what could be causing the problem. It feel like something may be sticking in my valve body but I do t know alot about transmission. I have also read about u joint. I just need some guidance in the right direction. It did it bone stock, before I did any modifications.