JLG Parts Steer Mode Select Switch for Caterpillar Telehandler(Rough Terrain Forklift) Machines. This switch allows the operator to select between 4 Wheel Steer, 2 Wheel Steer, and Crab Steer Functions on the machine. Model Use: TH351, TH514, TH357, TH408, TL642, TL943, TL1055, TL1255. Please ensure proper model and serial break before parts purchase.