all right i have a 05 4wd sr5, i recently installed a daystar 2.5/1.5 and put cooper discover ATP 265/75/16. when I get to about 60mph the steering starts to shake. i had the wheels and tires rotated and balanced and it still does it. My next step is to have High speed balancing done. but before i dish out $120 dollars, have any of you had this issue and what was done to fix it. all help and advice is appriciated .