ZF 4143.303.041 OIL DEFLECTOR | OEM Genuine Part

Overview

The ZF 4143.303.041 OIL DEFLECTOR is a precision-engineered component designed to manage lubricant flow within the transmission housing. Positioned directly on the rotating shaft assembly, this OEM genuine part prevents oil from escaping the bearing chamber and ensures consistent lubrication to critical gear sets. The SKU 4143.303.041 is a factory-specified deflector that works in tandem with the 4143101016 HOUSING and the 4143301039 HOUSING to maintain internal pressure balance. By redirecting splash oil away from seals, this deflector extends the service life of the entire transmission assembly.

Symptoms of Failure

• Oil leaking from the bell housing area: A worn or cracked deflector allows pressurized oil to bypass the seal, resulting in visible drips under the vehicle during operation.
• Gear engagement hesitation or slipping: When the deflector fails, oil starvation to the clutch packs causes delayed shifts and intermittent power loss under load.
• Abnormal whining or grinding noise from the transmission: Inadequate oil redirection leads to metal-on-metal contact in the bearing pockets, producing a high-pitched sound that worsens with RPM.
• Overheating of the transmission casing: Improper oil distribution creates hot spots, often detected by infrared thermometer near the deflector mounting point.

Technical Specifications

Compatibility

This oil deflector is engineered for the ZF HL 100 Series and HL 270 Series transmissions. It is also a direct fit for the following models: WG180, WG200, WG210, and WG250. For installations requiring a new seal, pair this deflector with the 0501318136 GASKET and secure it using the 0636101084 CAP SCREW. Always verify your transmission serial number against the ZF parts catalog before ordering.

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