Open the engine cover and look down at the position of the relay arm and idler arm. They should be pointing straight back, parallel with the main ladder frame. If not, then the link between the tie-rods out to wheels is off of its center point of movement. Use the tie-rod adjustment sleeves to get the relay arm and idler arm in the center of their swing (straight back, parallel with the chassis frame). Turn the sleeves a little bit on each side, alternating side to side and in the opposite direction so you do not move the front wheel position. You only want to shift the connecting rod to the center of its movement by setting the relay arm and idler arm point straight back.the center of its movement swing.