ZF 4644.306.499 COVER PLATE | OEM Genuine Part

Overview

The ZF 4644.306.499 COVER PLATE is a precision-engineered OEM genuine component designed to seal and protect the internal valve body and hydraulic circuits within ZF WG 180 and WG 200 series transmissions. This cover plate, identified by SKU 4644.306.499, mounts directly over the transmission housing to prevent contamination ingress and maintain consistent oil pressure. It works in conjunction with the TRANSMISSION HOUSING and the HOUSING to form a secure, leak-proof enclosure for critical shift components.

Symptoms of Failure

• External oil seepage around the valve block area: A worn or warped 4644.306.499 cover plate often leads to visible fluid drips beneath the transmission, especially after prolonged operation.
• Erratic gear engagement or delayed shifting: When this cover plate loses its sealing integrity, hydraulic pressure drops, causing hesitation or slipping between gears in WG 180 and WG 200 series units.
• Contaminated transmission fluid: A cracked cover plate allows dirt and debris to enter the valve body, accelerating wear on the VALVE BLOCK and shift systems.
• Audible hydraulic noise or whining: Air ingestion through a compromised cover plate creates cavitation, producing unusual sounds during gear changes.

Technical Specifications

Compatibility

This cover plate is engineered for ZF WG 180 and WG 200 series transmissions, commonly found in medium-duty trucks, buses, and off-highway equipment. It is a direct replacement for OEM assemblies requiring a secure closure over the valve block area. The 4644.306.499 interfaces with the TYPE PLATE for identification and is secured using the GROOVED STUD to ensure proper torque retention. Always verify your transmission model number before ordering.

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