So the past couple days I've noticed a weird knocking type noise around the 15-25mph range. It doesn't sound like it's from the engine but more like from the drivetrain, maybe the transfer case or transmission? The people i purchased it from had 3 22" rims an 1 20" rim. I know that with AWD transmission's you want all matching rims an tires so im wondering what affect that could have had on it. Any input is greatly appreciated an i really need help as i have to travel 250 miles in a couple days.