ZF 4642.121.473 OIL PIPE for WG150 | OEM Genuine Part

Overview

The ZF 4642.121.473 OIL PIPE is a critical fluid delivery component engineered specifically for the WG 150 Series transmission. This OEM genuine part ensures precise lubrication and hydraulic pressure flow within the valve body and rotating clutch assemblies. Positioned internally along the main shaft gallery, the oil pipe directs transmission fluid to critical bearing surfaces and planetary gear sets, preventing metal-on-metal contact. The SKU 4642.121.473 is manufactured to ZF’s exacting tolerances, guaranteeing a leak-free seal when paired with the correct 4642101047 TRANSMISSION HOUSING or 4642301207 TRANSMISSION HOUSING.

Symptoms of Failure

• Transmission fluid leaks at the pipe junction: A cracked or corroded oil pipe often causes visible drips near the bell housing or mid-case seam, leading to low fluid levels and eventual overheating.
• Delayed or harsh gear engagement: Insufficient hydraulic pressure from a compromised pipe results in sluggish shifts, particularly when moving from neutral to drive or reverse.
• Whining or grinding noise during operation: Starved bearings due to restricted oil flow produce a high-pitched whine that intensifies under load, indicating imminent internal damage.
• Erratic clutch slip under torque: A blocked or deformed oil pipe disrupts clutch pack lubrication, causing intermittent slipping that worsens during uphill climbs or heavy hauling.

Technical Specifications

Compatibility

This oil pipe is primarily designed for the WG 150 Series transmission, but it also fits select variants in the WG 180 and WG 200 families due to shared hydraulic circuit architecture. Always verify the internal gallery layout before installation. The pipe interfaces directly with the 0730365067 TYPE PLATE for correct orientation and is secured using the 0631311009 GROOVED STUD to prevent vibration loosening. Compatible models include WG150-6, WG180-8, and WG200-6 with serial numbers after 2015.

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