Tie Rods — Inner and Outer

Tie rods are the final link between the steering gear and the wheels. They transmit the lateral movement of the rack to the steering knuckle. Each side has an inner tie rod that connects to the rack end and an outer tie rod that connects to the steering knuckle. The outer tie rod threads onto the inner tie rod with a jam nut that locks the adjustment — this is how toe alignment is set.

Each tie rod end has a ball-and-socket joint. Over time and mileage, the ball wears inside the socket and develops play. That play translates directly into steering looseness. Worn outer tie rod ends are one of the most common causes of wandering steering and inner edge tire wear from toe that drifted out of specification.

Put the vehicle on a drive-on rack or lift it and support it under the control arms so the suspension is loaded in its normal position. Grab the tire at 9 o'clock and 3 o'clock — the sides. Push in with one hand and pull out with the other, then reverse. Any clicking or movement between the tie rod and the knuckle indicates a worn outer tie rod end. To check the inner tie rod, grab the inner tie rod boot at the rack and try to push and pull the tie rod in and out. Any movement indicates inner tie rod wear. Never check tie rods with the wheels hanging free — the unloaded suspension masks the play.

When replacing a tie rod end, always count the number of exposed threads or measure the distance from the jam nut to the tie rod end before removal. Set the new one at the same measurement. This gets the toe close enough to drive to the alignment machine safely. A full alignment is required after any tie rod replacement — do not return the vehicle without it.