Vehicle tools ease fleet maintenance by speeding up repairs and inspections and diagnosing issues. Diagnostic tools test vehicle systems, highlight areas needing repair, and monitor driver usage. Drivetrain tools connect a vehicle's transmission to the drive axles. Electrical and lighting tools repair batteries, spark plugs, electrical circuits, and interior or exterior lighting. Engine tools pull or install worn parts, hold timing chains, set timing, and test oil pressure. Exhaust tools help replace, repair, and improve exhaust systems. Fuel and air tools test and repair issues to correct flow and balance. Heating and cooling tools support the maintenance and repair of vehicle heating and air conditioning systems. Lubricant tools help fill, drain, transfer, and dispose of vehicle fluids. Steering, suspension, transmission, clutch, and windshield tools are specifically designed for repairs on these systems and their components. Wheel and brake tools repair, maintain, and replace tires and brake assemblies.