ZF 4644.321.236 INTERMEDIATE PLATE for WG200 | OEM Genuine Part

Overview

The ZF 4644.321.236 INTERMEDIATE PLATE is a critical structural component within the WG200 series transmission, serving as the central mounting surface between the main gear housing and the torque converter assembly. This OEM genuine part ensures precise alignment of planetary gear sets and oil flow channels. The SKU 4644.321.236 is engineered to withstand high torsional loads and thermal expansion, making it essential for maintaining driveline integrity in heavy-duty applications.

Symptoms of Failure

• Transmission oil leaks at the mid-case seam: A warped or cracked intermediate plate allows pressurized ATF to escape between the TRANSMISSION HOUSING and the converter housing, often visible as drips near the bellhousing.
• Intermittent gear slipping under load: When the plate distorts, it misaligns the valve body passages, causing delayed clutch engagement and erratic shift quality in WG200 units.
• Metallic debris in the oil pan: Fretting wear on the plate’s bearing surfaces generates fine metal particles, which accelerate wear on the DISCONNECTION assembly and planetary gears.
• Vibration during torque converter lockup: Loss of flatness in the intermediate plate creates axial play, leading to shuddering when the OUTPUT FLANGE transfers power to the driveline.

Technical Specifications

Compatibility

This intermediate plate is designed for the ZF WG200 series, including WG180, WG200, and WG210 variants used in municipal trucks, fire apparatus, and off-highway equipment. It directly interfaces with the HEXAGON SCREW fasteners that secure the assembly. For WG150 or older 4HP series, verify bolt pattern compatibility before installation.

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