ZF 4646.301.087 COVER for WG 250/WG 260/WG 310 | OEM Genuine Part

Overview

The ZF 4646.301.087 COVER is a critical sealing component engineered for the WG 250, WG 260, and WG 310 transmission series. This OEM genuine part sits on the rear or intermediate housing section of the gearbox, acting as a protective barrier against contaminants while maintaining internal oil pressure. Designed to precise ZF tolerances, the SKU 4646.301.087 ensures a secure fit when paired with the TRANSMISSION HOUSING and the HOUSING assembly. Its primary function is to shield the clutch pack and planetary gear sets from debris ingress, directly influencing transmission longevity.

Symptoms of Failure

When the ZF 4646.301.087 COVER degrades, operators often notice these specific failure indicators:

• External oil seepage around the rear housing joint – A worn cover gasket surface or cracked metal allows transmission fluid to escape, leaving visible drips under the vehicle.
• Gear engagement hesitation or slipping – Loss of hydraulic pressure due to a compromised cover leads to delayed shifts or clutch slip under load.
• Contaminated transmission fluid – A fractured cover permits dirt and moisture to enter the system, causing dark, gritty oil and reduced lubrication efficiency.
• Unusual whining or grinding noises – Insufficient sealing allows air ingestion, aerating the fluid and causing cavitation in the pump or bearings.

Technical Specifications

Compatibility

This cover is primarily validated for the WG 250 Series but also fits the WG 180, WG 200, WG 260, and WG 310 transmission models. It is compatible with both standard and heavy-duty variants where the rear housing interface matches the 8-bolt pattern. For secure installation, always use new HEXAGON SCREW and CAP SCREW fasteners to prevent thread galling.

Related Components