2010 F350 for Towing

[jcj0011]

I have a 2010 F350 Powerstroke crew cab short bed Lariate with 3.53s in it. I am not very happy with how it tows. I pull a 10k lb fifth wheel. Truck is 100% stock, dont want to mess with my warranty. The turbo lag is horrible, it has a hard time getting up hills, and even at 65 on a flat surface while pulling, the turbo gauge is between 3 and 4. I feel like I am going to burn up the engine. Does this seem normal to anybody.

[Squirly]

I've got a '10 F350 dually with 3.73's I pull between 15-18k 5ver toy hauler & I think it does pretty good!I do wonder some times how good it is for the engine to be reving @ 2800 rpm for extended times but I figure Ford designed it to do that so what do I know! I hit the tow/haul button set the cruise & let her rip!