i think i have a tranny issue... when ever the car downshifts into 1st gear i get a strong jerk.. but when i change setting to winter mode it goes away.. im sure it goes away because winter mode doesnt allow it to down shift to 1st.. only 2nd.. anybody else have this problem... any help?

 

I HAVE HAD THE SAME PROBLEM WITH MY CAR BUT ONLY WHEN I WAS GOING OVER 150 MPH IT SHIFTED FROM S TO W. I UNGRADED MY TRANNY TO A HIGH PRO LEVEL NOW ONLY TO LEARN THAT THE TRANNY DOES THAT ON PURPOSE TO GET MORE HP OUT OF THE ENGINE.