Originally Posted by ChrisSlicks

Sounds like the guide plate needs to be moved to the left a little. Should be a fairly simple job since it can be done topside, just need to lift the shifter boot and trim panel.

The installation procedure for the guide plate is described in TM-22,23. Basically stick the transmission in 5th and 6th and make sure the guide plate is resting against the shift leaver.

Print those 2 pages and bring it to the dealer, and ask why they didn't do that.