ZF 4661.003.030 4 WG 94 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4661.003.030 4 WG 94 Powershift Transmission Assembly represents a complete, factory-matched unit designed for heavy-duty off-highway applications. This fully assembled powershift transmission integrates the main gearbox, torque converter, and hydraulic control system into a single, ready-to-install package. As the core drivetrain component for the WG 94 Series, this assembly manages power distribution across four forward and reverse speeds. The SKU 4661.003.030 is the definitive replacement for worn-out transmissions, eliminating the need for piecemeal repairs. Within the assembly, the 4661101031: TRANSMISSION HOUSING provides the structural foundation, while the 4661301046: HOUSING II encloses the clutch packs and planetary gearsets.

Symptoms of Failure

• Delayed engagement or gear slipping under load: When the transmission hesitates before moving or loses power during acceleration, internal clutch pack wear or hydraulic pressure loss is likely. This is a common symptom in high-hour WG 94 units.
• External oil leaks near the bell housing or PTO ports: Worn seals or cracks in the main casing allow transmission fluid to escape, often visible as drips or wet spots on the chassis. This typically originates from the 4661101031: TRANSMISSION HOUSING or the 4661301046: HOUSING II interface.
• Erratic shifting or failure to shift into range: A failing 0501216064: RANGE SELECTOR or degraded valve body components cause the transmission to skip gears or get stuck in neutral. This is often accompanied by a flashing warning light on the dash.
• Abnormal whining or grinding noises: Metal-to-metal contact from worn bearings or damaged planetary gears produces audible sounds, particularly in lower gears. This indicates imminent catastrophic failure if not addressed.

Technical Specifications

Compatibility

This complete unit is specifically engineered for the ZF WG 94 Series, which includes the WG94, WG98, and WG100 models commonly found in telescopic handlers, wheel loaders, and industrial tractors. It is also backward-compatible with select WG180 and WG200 chassis when using the appropriate 4661198001: PERIPHERALS kit. The assembly directly replaces the 4 WG 94 variant in machines from manufacturers such as Manitou, JCB, and Claas. Always verify the bell housing pattern and output flange configuration against your original unit before installation.

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