Alright like the title says, my CTS just recently downshifting hard under breaking. When you go to slow down from anything over 20, it will jerk the entire car when it down shifts, then it will down shift into first and jerk the entire car again. The only happens when downshifting from 3rd to 2nd then 2nd to 1st. Also when you're crusing at 20mph and it goes to kick down when you accelerate, it jerks the whole car. Any help would be apperciated. It feels maybe like valve body, or the tranny needs flushed. Just wanted to check to see if any other CTS owners have had this problem.
Thanks
Thanks