ZF 4661.102.023 INPUT for WG94 | OEM Genuine Part

Overview

The ZF 4661.102.023 INPUT for WG94 is a precision-engineered input shaft assembly designed to transfer torque from the engine directly into the planetary gear set of the WG 94 Series transmission. This OEM genuine part, identified by SKU 4661.102.023, serves as the primary rotational interface between the driveline and the hydraulic torque converter. Constructed from high-strength alloy steel, it ensures minimal torsional deflection under heavy loads. For a complete rebuild, this input shaft must be paired with a secure TRANSMISSION HOUSING to maintain proper alignment and oil circulation.

Symptoms of Failure

• Delayed engagement or gear slipping under load: When the input shaft splines wear, the clutch packs fail to lock up, causing the transmission to hesitate or slip during acceleration.
• Metallic grinding noise from the bell housing: Worn bearing journals on the 4661.102.023 create a distinct scraping sound, often mistaken for torque converter failure.
• Contaminated transmission fluid with metal particles: Flaking from the hardened surface of the input shaft introduces ferrous debris into the oil, which can damage the HOUSING II and valve body.
• Vibration during gear changes: An out-of-spec input shaft causes radial runout, leading to harsh shifts and premature wear of the CYLINDRICAL PIN that secures the gear train.

Technical Specifications

Compatibility

This input shaft is specifically engineered for the ZF WG 94 Series, including the WG180, WG200, and WG240 models used in off-highway trucks, wheel loaders, and heavy-duty agricultural tractors. It also fits select WG94 variants in mining dumpers and mobile cranes. Always verify the TYPE PLATE on your transmission housing to confirm the exact series before installation.

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