ZF 4657.063.303 3 WG 211 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4657.063.303 3 WG 211 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly serves as the central power distribution hub within the WG 211 series, managing torque flow from the engine to the driveline and PTO systems. As a complete unit, it integrates the main gear cluster, clutch packs, and hydraulic control circuits into a single, ready-to-install package. The SKU 4657.063.303 is a direct OEM replacement, ensuring that your loader, grader, or industrial vehicle returns to full operational capacity without the need for piecemeal repairs.

Symptoms of Failure

When the ZF 4657.063.303 assembly begins to fail, operators will notice distinct performance issues. Delayed or harsh engagement between forward and reverse gears is a primary indicator, often caused by internal seal degradation or worn clutch discs. Intermittent gear slipping under load is another common symptom, where the transmission loses torque during heavy pushing or grading operations. External oil leaks around the main housing joints or output shaft seals are frequently observed, leading to low fluid levels and eventual overheating. Finally, unusual whining or grinding noises from the transmission case suggest bearing wear or gear tooth damage within the assembly.

Technical Specifications

Compatibility

This complete unit is specifically engineered for the ZF WG 211 series of powershift transmissions. It is directly compatible with the WG180, WG200, and WG211 models commonly found in articulated dump trucks, wheel loaders, and motor graders from manufacturers such as Volvo, Case, and Caterpillar. The assembly is also suitable for select WG150 and WG170 variants that share the same bellhousing pattern and input shaft spline count. Always verify your transmission model tag before installation.

Related Components

When installing the 4657.063.303 assembly, several companion parts must be inspected or replaced to ensure a leak-free, durable rebuild. The TRANSMISSION HOUSING (4657101087) provides the structural foundation for the entire gear train. The HOUS.FRONT SECT (4657301172) and the HOUSING REAR PART (4657301173) enclose the clutch packs and planetary gears. Finally, the CYLINDRICAL PIN (0631306816) is critical for aligning these sections during reassembly.

Frequently Asked Questions

Q: Is the 4657.063.303 a direct bolt-in replacement for my WG211 transmission?
A: Yes, this is a complete factory-spec assembly designed to replace the entire gear train and clutch system in WG211 series transmissions. It includes all internal components pre-assembled and requires no modification for installation.

Q: What other parts should I replace when installing this unit?
A: We strongly recommend replacing the TRANSMISSION HOUSING and both the front and rear housing sections (4657301172 and 4657301173) if they show signs of wear or cracking. All cap screws and the cylindrical alignment pin should also be renewed.

Q: How do I verify this part fits my specific vehicle model?
A: Check the transmission model plate on your machine. This assembly is designed for ZF WG180, WG200, and WG211 models. If your transmission tag lists a different series, please contact our technical team with your serial number for cross-reference.