All Balls Racing – Driveshafts & U-Joints - Arctic Cat, including front drive shaft engine-side U-joints for the 2002 Arctic Cat 375 4x4 with AT and the 01-05 250 4x4, upper jack shaft bearing and seal kits for the 07-09 Cross Fire 500 EFI, 12-13 600 Sno-Pro, and 76-80 Jag 2000, and lower track drive shaft bearing and seal kits for the 77-80 Lynx 2000 S and 2003 Panther 370. Driveline shafts see constant torque reversal plus water and snow packed straight into the bearing housings, so seals are the weak link and a leaking one ends in a rusted race and a rumbling shaft. Fresh Arctic Cat driveline bearing and U-joint kits restore proper shaft support and alignment, which keeps the chaincase and track turning true, stops the driveline vibration that loosens bolts, and protects the bearing bores in the case from getting eaten out. Everything comes as a complete kit so you are not sourcing loose seals midway through a teardown. Press the new bearing in square with the right driver so the outer race is not distorted. Reference numbers matter here, so send us your model and year and we will confirm the right kit before you order.