I did not notice a huge difference. I would say it's probably why the truck feels "more substantial" though. I tow an 8K lb boat and am headed out next week so I'll report back after, as I think shift points will become more pronounced under load. I also put 1.5 inch spacers in tonight. The back looks great but the front rubs the small mudflaps right on the plastic rivet. Ill remove it tomorrow to see if it solves the problem. If not Ill take the front spacers off, it looks fine with them just in the back anyway.How are the transmission shift points now with the 285/55/22's? That is my biggest worry with going to the same size tire on mine when I get my lift. I have basically the same truck as you with the 3.92, non-etorque.