ODD TIRE WEAR???
 

hello, ive got a 2000 SR5 4x4. my problem is that i am experiencing bad tire wear on the inside of my front tires. It ruined the last pair. got new ones and 2 alignments in about 3 weeks @ 2 seperate shops. New tires were put on and rotated regularly but they are still showing wear. Alignment was checked again and was right on the money.
There is a "thunk" sound when in hard breaking or when light breaking in a left turn.

Any ideas on what my problem might be? I've checked everything i know to under it. I even put pressure against the insides of the tires trying to get some kind of movement, but nothing. I was hoping this had happened to a few other people so there might be a solution.