every once in awhile when i turn right my truck jerks like it would be in 4wheel drive on dry pavement anyone know what could be causing this happens very rarely. back in october when i was backing up my one wheel locked up and dragged as the other wheel pushed the truck then put it in drive and then reverse again and it was gone. can someone help me out with wat the problem could be truck is a 2002 sierra Z71 122k miles