[NorCal 4x4]

i just took the truck in for the IPDM recall last month but im guessing thats different than the TCM relays...

stupid question but which would be better to go to....Dealer or Transmission shop??

Maybe a gear shop ... What diameter tires are you running, and do you have the 2.94 gears or the 3.36 gears?

Mine didn't have any issue with my 33.5" M/T's but with 33.98" Terra's it does the same thing. In my case it's the gearing change from the larger tires affecting the torque converter locking it into overdrive. I would think it would happen with even smaller than 34's if you have the 2.94 gears.

 

[NorCal 4x4]

Little tow gear and had 275-70-18's, 33.2" tall, on my Titan and never had shifting issues.

Wonder what it would be for most 2.94's, I know that not all of the 3.36's have issues with 34's, but on mine it was noticeable as soon as they went on, and they are 11 pounds lighter than the 33.5" tires which never had the issue.

 

[NorCal 4x4]

Wouldn't be a problem with your 3.36 and a 33.2" tire. Maybe one of the other suggestions.
Have you changed your fluid? I did the drain and fill on mine, (5 times a few months apart, this gives close to 90% new fluid), and it is way easier than even doing engine oil/filter changes. http://www.titantalk.com/forums/tit...2468-transmission-drain-fill.html#post2156564