ZF 4644.026.372 6 WG 200 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4644.026.372 6 WG 200 Powershift Transmission Assembly is a complete, remanufactured unit designed for heavy-duty off-highway applications. This fully assembled gearbox integrates the main drive housing, clutch packs, and hydraulic shift controls into a single drop-in solution. The SKU 4644.026.372 serves as the core rotating assembly within the WG 200 series, transferring engine torque through six forward speeds and one reverse gear. It directly interfaces with the TRANSMISSION HOUSING and the TRANSMISSION HOUSING to form the structural backbone of the drivetrain. This assembly is critical for maintaining precise gear engagement under extreme loads in construction, mining, and agricultural machinery.

Symptoms of Failure

• Delayed or harsh gear engagement: When the internal clutch packs or hydraulic seals degrade, operators experience a noticeable lag or jarring shift between forward and reverse gears.
• Internal oil leaks and low pressure: Worn gaskets or cracked housings cause transmission fluid to escape, leading to erratic shift timing and eventual overheating.
• Unusual whining or grinding noises: Damaged bearings or planetary gear sets within the assembly produce metallic sounds during acceleration or deceleration.
• Complete loss of drive in specific gears: A failing shift system or broken sun gear results in the transmission refusing to engage one or more forward speeds.

Technical Specifications

Compatibility

This complete unit is engineered for the ZF WG 200 series powershift transmissions. It is directly compatible with the WG 180, WG 200, and WG 210 models used in telehandlers, wheel loaders, and dump trucks. The assembly also fits select variants of the ZF 6 WG 200 and 4 WG 200 platforms. For proper sealing, always install a new O-RING between the main housing and the COVER PLATE during reassembly. Verify bellhousing bolt patterns against your specific machine model before ordering.

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