So I've got an excursion that I tow a 30' toy hauler with. Fully loaded, its approx 11,500lbs. I realise it's a lot of weight for ex but I thought itd tow it better then it does. I've done a ton of work to it, heavy duty rebuilt trans with the extra clutches and a tugger shift kit. Went through the motor, deleted the ebpv valve, rebuilt the stock turbo, upgraded the turbo wheel, oil crossover lines, and added the napa air filter. Also added a 6.0l trans cooler. Its lifted with 35s. I want a little more giddy up and go. Right now I have a super chips programmer. Not super impressed with it because I dont care for the shift points. I'm looking at the hydra chip and my question is should I also regear to 4.10s? All in all it's pretty good at everything else. Fuel economy isnt awesome. Still has the stock exhaust. The other thing I'm not sure on, is it makes a whooshing sound when your at cruising speed. It's not turbo whistle, it sounds like a leak. Could that be the waste gate?