I jumped on my 05 w/ juice tonight and when it went to shift into 5th gear it fell right on its face. Didnt sound too good, and had a hell of a time getting off the line from a stop. When i went to back out of my buddies driveway, it wouldnt go into reverse. The shift lever felt way too soft and the light under the R was flashing. It would not back up. I shut the truck off for about a minute, and then when i started back up it ran fine. Check engine light was still on, so I took it to a shop and they put a code reader on, and it gave me DO735 (5th gear fault). After 3 starts the check engine light cleared itself, and the truck seems to run fine now. I have not gotten after it again, in fear, but is this something I should take to the dealer to have looked at? I dont want to blow up the tranny, but warantee is still good (only 8000mi). What should I do?