ZF 4651.033.013 3 WG 100 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4651.033.013 3 WG 100 Powershift Transmission Assembly is a complete, factory-engineered unit designed for heavy-duty off-highway machinery. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single, ready-to-install package. As a core element of the WG 100 Series, it manages torque distribution across multiple speeds, ensuring smooth power delivery under extreme loads. The SKU 4651.033.013 replaces worn or failed assemblies, restoring original performance in loaders, graders, and industrial vehicles. This unit interfaces directly with the TRANSMISSION HOUSING and the HOUSING to form a sealed, pressurized system.

Symptoms of Failure

• Delayed or harsh gear engagement: When the assembly wears, hydraulic pressure drops, causing a noticeable lag or clunking when shifting between forward and reverse. This is a common sign of internal clutch pack degradation.
• Torque converter shudder under load: A vibration or shudder during acceleration, especially at low speeds, indicates worn friction discs or damaged seals within the assembly.
• External oil leaks near the bell housing: Cracks in the unit or failed gaskets allow transmission fluid to escape. Check for drips around the mating surface with the O-RING and the HOUSING.
• Loss of power in higher gears: Slipping in 3rd or 4th gear often points to worn planetary gears or a failing spool valve inside the assembly.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 100 Series of powershift transmissions. It is directly compatible with models including the WG 100, WG 120, and WG 150. The assembly also fits select variants of the WG 180 and WG 200 when used with the appropriate HOUSING adapter. Always verify the transmission serial number against the SKU 4651.033.013 to ensure correct fitment for your specific machine.

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