Canuck714
FRF Addict
It sounds like your issue is in the T-Case or dif.No change when you swapped and rebalanced the tires?
Have you gone to one of the good dealers mentioned and taken a 24 for a test drive to see if what you are feeling is there on the new truck?
Might be worth the time, then you can start the process with service as a verifiable difference this truck to that truck...eliminate the "its normal"
Also, is the dealer that wont do anything the dealer you bought the truck from?
I have heard from a couple people that Galpin is good. No first hand experience...