I am looking at a 2005 Tundra TRD off road package, I am new to trucks and I was wondering what I should look out for when buying a 2005 tundra. I test drove it and I noticed a bit of a ticking sound on acceleration, is this normal? Also when i was trying out the 4x4 i noticed that when I pressed the 4 low button nothing happened. Is there some way I am supposed to use the 4 low option? When I pressed the 2wd /4 High button it clicked in and had the green light on it. But when I pressed the 4 low button nothing happen didnt click in and didnt show a green light, is this normal? Is there anything else I should look out for when buying? thanks for any replies.