ZF 4646.301.166 COVER for WG 250/WG 260/WG 310 | OEM Genuine Part

Overview

The ZF 4646.301.166 COVER is a precision-engineered OEM genuine component designed for the WG 250, WG 260, and WG 310 transmission series. This part serves as a critical sealing and protective element, mounted directly onto the transmission housing to shield internal gear assemblies from contaminants while maintaining proper oil pressure. As an integral part of the WG 251 Series category, the SKU 4646.301.166 ensures a factory-spec fitment that prevents debris ingress and supports optimal lubrication flow. When installed alongside the TRANSMISSION HOUSING, this cover creates a sealed environment essential for long-term drivetrain reliability.

Symptoms of Failure

• Transmission fluid seepage around the cover perimeter: A worn or cracked 4646.301.166 cover often leads to visible oil leaks, particularly during high-load operations, which can be detected as drips under the vehicle or wet spots on the housing.
• Gear engagement hesitation or slipping: When the cover loses its seal integrity, pressure drops within the clutch packs, causing delayed shifts or unexpected gear disengagement during acceleration.
• Contaminated transmission fluid: A compromised cover allows dirt and moisture to enter the system, resulting in gritty or discolored oil that accelerates internal wear on components like the HOUSING assembly.
• Unusual whining or grinding noises: Debris intrusion due to a failing cover can cause abrasive contact between gears, producing audible metallic sounds that worsen with speed.

Technical Specifications

Compatibility

This genuine ZF cover is engineered for the following transmission models within the WG series family: WG 180, WG 200, WG 250, WG 260, and WG 310. It is also directly compatible with the WG 251 Series category. For proper installation, this cover must be paired with the CAP SCREW fasteners and the COVER SHEET to ensure a leak-proof seal against the main housing.

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