Have a 2001 SC Crew Cab. Bought the truck used in May and have been very pleased. When I test drove the truck I put it in 4WD and all seemed fine. This is my first 4WD vehicle. This week my boys and I were out hiking and found the going a little slippery on muddy hill. So put it in 4WD and up the hill we went. However I noticed that it seemed like that when I let my foot off the accelerator I was on the brakes. Noticed this at very slow speeds, but not straight line driving. No weird sounds, grinding or groaning. Simply feels like I've hit the brakes until I give it some gas. Anybody got any thoughts on this?