first I couldn't adjust the butt part of the seat up and down. And now I can't slide it forward. I discoverd this while moving my seat forward from the fully back postion, it stopped and will not go any farther. Fortunatly I'm a big guy and can mostly reach the pedals, but I like to sit close to the dash. The power seat on the passenger side works great thouhg. can I just switch the two?