full lock both ways in forward and reverse to check the 4wd is working, any clunking or heave steering and there might be a problem, rear brakes can be problematic, back door handle hanging off and or rust where it mounts. all 3/5 windows go up and down (wire operated). crankcase breather on the head has been changed or uprated. if your not going off road with it then 2wd will be ok and better on fuel.