ZF 4646.302.070 OIL FEED FLANGE for WG251 | OEM Genuine Part

Overview

The ZF 4646.302.070 OIL FEED FLANGE is a precision-engineered component designed for the WG 251 series of heavy-duty automatic transmissions. This OEM genuine part ensures a controlled and uninterrupted flow of hydraulic oil from the pump to the torque converter and clutch packs. Positioned at the interface between the pump housing and the main casing, the flange maintains critical lubrication pressure. The SKU 4646.302.070 is factory-machined to exact ZF tolerances, preventing fluid bypass that can degrade shift quality. When installed alongside a TRANSMISSION HOUSING and a HOUSING, this flange forms a sealed oil gallery essential for long-term transmission reliability.

Symptoms of Failure

• External oil seepage at the pump-to-case joint: A worn or cracked 4646.302.070 flange allows pressurized ATF to escape, leaving visible drips under the bell housing.
• Delayed engagement or gear slipping: Insufficient oil feed pressure due to a damaged flange causes soft shifts and clutch pack chatter during acceleration.
• Overheating transmission fluid: A compromised oil feed disrupts cooler flow, leading to elevated sump temperatures and burnt fluid odor.
• Low line pressure codes (DTC P0741/P0841): Internal leakage past the flange reduces main circuit pressure, triggering diagnostic trouble codes in electronic controls.

Technical Specifications

Compatibility

This oil feed flange is specifically engineered for the ZF WG 251 series transmission. Based on its design and port configuration, it is also compatible with the WG 180, WG 200, and WG 250 series used in off-highway trucks, wheel loaders, and agricultural tractors. Always verify fitment by cross-referencing the COVER and CAP SCREW patterns on your specific unit. The flange interfaces directly with the pump housing and must be paired with a genuine gasket to prevent leaks.

Related Components