car drove perfectly fine then just suddenly had a bunch of issues after leaving a gas pump. when I engage reverse it shifts really rough like if all the motor mounts were bad (they are brand new). Drive feels like I'm leaving in third gear and if I try and get past lets say 30mpg if feels like the tranny down shift to first gear. the same goes for 3rd and 2nd but L parks the car. idk what to do I have a spare trans that came with the TC after I swaped the trans and motor a year ago. but I have no idea what parts to take off of the spare trans.