I thought I would make a new post on this since the big one is getting heavy with all the reflash hoo ha on the newer vehicles. Basicaly, I replaced the rear engine mount since it did not have the recomended 1/4" spaceing suggested in the TSB. The mount still "looked" good once I had it off but I replaced it with the $400 dollar unit any way. That did little to nothing in retarding the trany vibration. Next I did 3 full trany drainings and a trany filter replacement on the last trany refill useing Amsoil Universal trans fluid for all 3. Then it was time for vacation. NY to VA, SC to TN and back to NY over a period of 3 weeks in August heat. At first, the trany seemed to be shifting better with less shudder and as time went on I could definately say the trany shutter was becomeing less and less an issue. I cant say its completely gone since the parameters the shuttering was in has closed to such a small window of luging/engine speed, the slightest steping in of throttle or backing off puts a end to whats left of a very faint sign of judder. And that is now only on rare occassion. Its actualy completely out of mind now so it would be a surprise if I feel a hint of it. Before this Amsoil change, the dealer did a trany service 6K earlier. The trany would shutter so bad at times, it felt like the trany was dam near bounceing off the pavement! It was REAL bad. The 3 gallons of Amsoil cost me just over $100 bucks. But now, judder shutter is a non issue and the van still gets 19/23 mpg, unlike the mpg beating you will get from the reflash as reported here. Oh, the van had 117K on it when I did the Amsoil and now we have 127K.