Roadsafe 4wd Heavy Duty Track Rod for Landcruiser 80 & 105 Series TR4410The tie rod also known as a track rod is an adjustable rod that runs behind the diff connecting the left and right wheels. Its main purpose is to control the track or toe in out of the wheels and ensure they are aligned. (When a wheel alignment is done on a vehicle this is one of the things that is adjusted.) Given its position it becomes vulnerable in four wheel drives when going off road, therefore upgrading to a thicker, tougher track rod is