Originally Posted by wreak

I don't understand why they can't fix the 9spd ZF with a simple software upgrade. My 2012 TL had annoying shifting problems and they released a software upgrade a couple years ago that totally fixed the hesitation and made the car feel completely different (in a good way). Not sure why they can't figure out a permanent fix with the 9spd after putting in some R&D. You can fix gear hunting and bogging aka shifting too early with the software so I'm baffled, that is unless the problems are deeper than that.