I have around 700 miles on mine. There are two main things that are noticeably annoying at this point. First, when going over bumps, speed bumps, uneven roads, anything that shakes the bed, there is a rattle in rear driver side that I cannot figure out. Sounds like the bed is loose on that side maybe. Second thing is the shifting...third gear is POS. I've noticed if I baby the throttle pedal it shifts pretty smooth, but if you need to "hit" it or are a little heavy on the pedal, it shifts rough into third, and then 4th is obvious the torque converter locks in. 68RFE still has downshift problems also in traffic...not as bad as previous years, but still noticable.
This is what I noticed on mine.