OTC4543A-6 - FWD front spindle puller. Removes front spindle to access needle bearing, when lubricating and aligning front wheels. Fits spindle thread sizes 2"-16, 1-5/8"-16 and 38 mm-1.5. OTC4543A-4 - 6-lug socket for removing and installing 4-slot front axle locknuts on 1978-84 Ford F-Series 4WD heavy-duty 3/4- and 1-ton trucks; 1973-81 GM 4WD 3/4- and 1-ton trucks.