ZF 4661.042.012 2 WG 94 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4661.042.012 2 WG 94 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This core assembly integrates the main gear cluster, clutch packs, and hydraulic control elements within a robust casing. As the central power delivery module in the WG 94 Series, it converts engine torque into precise, shift-on-the-fly output for loaders, dozers, and graders. The SKU 4661.042.012 denotes a fully assembled unit, ready for direct installation after removal of the worn assembly. It interfaces directly with the TRANSMISSION HOUSING and the HOUSING II to form the sealed gearcase.

Symptoms of Failure

• Erratic or delayed gear engagement: When the internal clutch packs or sprags wear, operators experience hesitation or harsh shifts, especially when transitioning from forward to reverse under load.
• Low hydraulic pressure and overheating: A failing assembly often causes internal leakage, leading to reduced clutch apply pressure and elevated sump temperatures above 120°C.
• Metallic debris in the oil filter or magnetic drain plug: Worn bearings or gear teeth from the 4661.042.012 unit shed ferrous particles, contaminating the lubrication system.
• Audible whining or grinding from the bell housing: Damaged planetary gears or thrust washers produce a distinct noise that increases with engine RPM, indicating imminent failure.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 94 Series powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG211 used in articulated dump trucks and wheel loaders. The 4661.042.012 assembly also fits select WG 94 variants in agricultural tractors and forestry skidders. Always verify the housing casting numbers and the TYPE PLATE to confirm exact model fitment before installation.

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