i went and got my breaks serviced yesterday and the guy at the shop told me that tundras have inherant brake problems. this guy happens to be a friend of mine and i trust him, although this is only ONE guys profesional opinion. he said that tundras have a proportiong valve problem. basically, the valve comes out of adjustment too quickly. and what happens is when the valve is out of adjustment, there is not enough pressure to the rear brakes so basically the rear drums dont work. so you can imagine how this would affect the front brakes on a 4,000 lb. truck. so it wears brake components down at a rate faster than normal. he told me that i can bring it in every 3-4 months and they will inspect them and adjust the valve or whatever else needs adjusted for free. just giving you guys a heads up.