'07 Dodge 6.7L harsh shifts using tow haul or exhaust brake?

Talking to an man with the 2007 3500 srw Ram and he always had a manual trannie. But the 2007 was bought back because of the famous light coming on in the dash. 64 times on a long trip towing his alpenlite so the new truck to replace the buy back was an auto. He complained about the very hard downshift and was worried it would effect the fifth so he bought the trailair pin box but that was no help. He finally had a reflash on the truck and this made it better. Have you asked the dealer?
chevman