Yetii, none of the new 2000 series will come to a screaching halt when you release the F or R pedals! If you peek underneath at the motion control rod assembly, you will see a small gas assist strut just like the ones for the liftgates and glass hatches on cars/trucks. This strut is what 'softens' the transition when you mash or release the pedals. Without it, you'd have to hang on for dear life or kiss the steering wheel or get tossed off the seat everytime you take your foot off a pedal. It is a possiblity that strut/shock is too strong or defective on yours, or something is loose under there. I had a loose bolt (one of 4 bolts) that holds the whole pedal cradle assembly. I would have your dealer replace the strut first!! I cant see how this is an internal trans issue.
G/luck
Joel