ZF8HP45/50/70 P1 Planetary Hub

The ZF-8HP45/50/70 P1 Planetary Hub is an internal transmission component associated with the P1 planetary gear assembly. It serves as an important connection point within the planetary system, helping transfer and manage rotational forces between the planetary components and their associated clutch assembly.

The P1 planetary gearset works alongside the P2, P3, and P4 planetary assemblies to produce the transmission's eight forward gear ratios and reverse. The P1 assembly also works with the B brake, which holds the P1 annulus gear stationary when required for specific gear ranges.