ZF 4646.301.112 COVER SHEET for WG250 | OEM Genuine Part

Overview

The ZF 4646.301.112 COVER SHEET is a critical sealing and protective component designed for the WG 250 series transmission. This OEM genuine part sits at the interface between the main transmission housing and the clutch housing assembly, serving as a barrier against contamination and fluid loss. By maintaining structural integrity in this high-vibration zone, the 4646.301.112 ensures that internal pressure remains stable during heavy-duty operations. This cover sheet works in concert with the TRANSMISSION HOUSING (4646101062) and the HOUSING (4646301104) to form a sealed unit that withstands extreme thermal cycling and mechanical stress.

Symptoms of Failure

• Oil seepage at the housing joint: When the 4646.301.112 cover sheet degrades, transmission fluid may weep from the seam between the COVER (4646301300) and the main case, leaving visible drips under the vehicle.
• Gear engagement hesitation: A warped or cracked cover sheet can allow debris ingress, causing intermittent slipping during low-speed maneuvering or under load.
• Abnormal transmission noise: Loss of sealing integrity permits air intrusion, leading to whining or grinding sounds from the gear train during acceleration.
• Pressure drop warnings: In advanced wear, the cover sheet fails to maintain hydraulic circuit pressure, triggering dashboard alerts or erratic shift patterns.

Technical Specifications

Compatibility

This genuine ZF cover sheet is engineered for the WG 250 series but also fits select variants in the WG 180 and WG 200 families where the housing interface dimensions match. It is a direct replacement for units requiring a CONNECTING PART (4646323018) to bridge the transmission case and torque converter housing. Always verify your transmission model code against the OEM parts catalog before installation.

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