When you say it shifts rough, do you mean that it hits the gear changes hard and firm, or like it hunts between gears? Two totally different issues, either one could be called rough shifts.
I read this and did some searching and found this kit to fix this issue along with some other info on what seems to go wrong and how to pump up the torque some.99Bo said:we hooked it up to the computer and it gave us code p1870 which is the control valve body in the transmission. it descrirbed our problem almost perfectly! Only problem is the part is over $400! Atleast it is not the transmission already! Thanks for the help everyone and I hope this can help others too!