ZF8HP45/50/70 Planetary Sun & Hub Gear

The Planetary Sun & Hub Gear from Sunbelt Valve Bodies is an internal transmission hard part for select ZF 8HP45, 8HP50, and 8HP70 eight-speed automatic transmissions.

This Hub has been cleaned, inspected and refurbished.  The sun gear sits at the center of the planetary gearset and meshes with the pinion gears on the carrier. The hub connects the sun gear to its mating component, allowing it to transmit torque as the transmission selects different gear ratios.

When to Replace It

Replace the sun and hub gear during a rebuild if inspection reveals chipped or pitted gear teeth, worn hub splines, or looseness at the splined connection. Inspect the mating pinion gears and splines for wear before installing the replacement.

Need Replacement Help?

If you experience any difficulty in attempting to repair or replace parts for your valve body, sign up for our Technical Support line where we can help identify your problem, and provide 20+ Years of valve body repair experience right to your car at home.