ZF 4657.354.022 PUMP SHAFT for WG210 | OEM Genuine Part

Overview

The ZF 4657.354.022 PUMP SHAFT is a critical internal component engineered specifically for the WG 210 Series transmission. This genuine OEM part serves as the primary rotational interface between the torque converter and the hydraulic pump, transferring mechanical energy to pressurize the transmission’s lubrication and control circuits. Without a properly functioning pump shaft, the entire hydraulic system cannot maintain the necessary pressure for clutch engagement and gear shifts. The SKU 4657.354.022 is precision-machined to exact ZF tolerances, ensuring seamless integration with the TRANSMISSION HOUSING and the HOUS.FRONT SECT assembly. This shaft is located within the front pump section of the transmission, directly behind the bell housing, where it engages with the pump drive gear.

Symptoms of Failure

When the ZF 4657.354.022 pump shaft begins to wear, operators typically notice several distinct performance issues. Low hydraulic pressure at idle is a common early indicator, often accompanied by a whining noise from the pump area as the shaft loses its concentric alignment. Intermittent gear slipping under load occurs when the shaft cannot maintain consistent pump output, leading to clutch pack pressure loss. Another frequent failure symptom is metallic debris in the transmission oil pan, caused by the shaft splines or bearing journals wearing against the HOUSING REAR PART. Finally, erratic shift timing or delayed engagement when shifting from Neutral to Drive can indicate a failing pump shaft that is not driving the pump at full capacity.

Technical Specifications

Compatibility

This genuine ZF pump shaft is primarily designed for the WG 210 Series transmissions, but it also fits select models within the broader WG family. Based on the shaft geometry and spline configuration, the 4657.354.022 is compatible with the following ZF transmission models: WG 180, WG 200, WG 210, and WG 250 (early production). It is also used in certain Ecomat 4HP and 5HP variants that share the same pump housing architecture. Always verify the CYLINDRICAL PIN alignment and the CAP SCREW torque specifications when installing this shaft into the TRANSMISSION HOUSING.

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