I have a question for you guys; I am uncertain why this is happening to my truck, but since I bought it... when I try to drive it in 4wd, the front wheel seems to lockup on every revolution or so..which leads me to believe its gear mismatch. I havent acutally jacked up the car to count the revolutions... but, it only skips by about 1 inch. I know that the tire which skips the most is the right front side... could it simply be that tire wear is the issue? The right front tire has about 60-75% more tread wear (oldest tire on the truck). The two rear ones are virtually brand new. Coudl this cause it?