ZF 4644.330.356 COVER PLATE for WG180 | OEM Genuine Part

Overview

The ZF 4644.330.356 COVER PLATE is a critical sealing and structural component designed for the WG 180 series transmission. This OEM genuine part, identified by SKU 4644.330.356, mounts directly to the rear section of the transmission housing, providing a secure barrier that protects internal clutch packs and valve bodies from external contaminants. It also serves as a mounting interface for the shift system and ensures proper oil retention under high-pressure operating conditions. When installed alongside the 4644101080: TRANSMISSION HOUSING, this cover plate maintains the integrity of the hydraulic circuit, preventing pressure loss that can degrade shift quality.

Symptoms of Failure

• External oil seepage around the rear bell housing: A worn or warped cover plate often causes fluid to escape near the mating surface, leading to low transmission fluid levels and eventual overheating.
• Intermittent gear slipping under load: When the cover plate loses its seal, hydraulic pressure drops, resulting in delayed engagement or slipping between gears during acceleration.
• Contaminated transmission fluid: Cracks in the cover plate allow dirt and moisture to enter the system, causing premature wear on the 4644301333: HOUSING and internal bearings.
• Unusual whining or grinding noises: A loose cover plate can vibrate against the 0730365125: TYPE PLATE, generating metallic sounds that worsen with engine RPM.

Technical Specifications

Compatibility

This cover plate is engineered primarily for the ZF WG 180 series, but it also fits select variants of the WG 200 and WG 150 transmissions where the rear housing bolt pattern matches. It is a direct replacement for units built between 2005 and 2020. For proper installation, ensure the 0631311009: GROOVED STUD is torqued to specification to prevent misalignment. Always pair this cover plate with a new 4644306470: GASKET to achieve a leak-free seal.

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