Re: 6 speed suddenly rough shifting
Have you attempted to pull codes? From your facts, going to M put you in sports mode and it may have temporarily got stuck in this mode, technically referred to as driver shift control quadrant. You would have more aggressive shifts when in this mode. The 6L is so heavy with electronics that I would start with codes. If you don’t have any, try going back into M mode and back into standard to see if the electronics can get you back to normal.
__________________
Customization is what you want it to look like -- not what other people think it should look like
|