Overview
The ZF 4657.065.003 5 WG 211 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready gearbox core designed for heavy-duty off-highway machinery. This complete unit integrates the planetary gear sets, clutch packs, and hydraulic control system within a single robust housing. As a direct OEM replacement, the SKU 4657.065.003 serves as the central power transfer module in the WG 211 series, converting engine torque into precise, shiftable output for loaders, graders, and industrial tractors. The assembly interfaces directly with the TRANSMISSION HOUSING to ensure structural integrity and proper alignment of all rotating components.
Symptoms of Failure
- Delayed or harsh engagement: When the complete unit wears, operators experience a noticeable lag between shifting and actual gear engagement, often accompanied by a jarring clunk.
- Internal oil leaks and pressure loss: Worn seals within the assembly cause hydraulic fluid to bypass, leading to low line pressure and visible drips from the bell housing area.
- Gear slipping under load: A failing unit cannot maintain clutch pack clamping force, causing the transmission to slip out of gear when the machine is under heavy load or climbing grades.
- Unusual whining or grinding noises: Bearing wear or planetary gear damage inside the assembly produces a high-pitched whine or metallic grinding that changes with engine RPM.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.065.003 |
| Series | WG 211 (5-Speed Powershift) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | High-strength cast iron alloy |
| OEM Reference | ZF 4657.065.003 |
| Input Spline | 14-tooth, SAE 3 |
Compatibility
This complete unit is engineered specifically for the ZF WG 211 series of powershift transmissions. It is also compatible with earlier WG 180 and WG 200 series models when used as a full assembly upgrade, provided the HOUS.FRONT SECT and HOUSING REAR PART are matched to the same revision. The assembly is commonly found in ZF 5WG211, 4WG211, and 6WG211 configurations for construction and agricultural equipment. Always verify the CYLINDRICAL PIN alignment during installation to ensure correct dowel engagement between the housing sections.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101049 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4657301130 | HOUS.FRONT SECT | Front section housing for input shaft and pump drive |
| 4657301131 | HOUSING REAR PART | Rear section enclosing output shaft and parking brake |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing mating surfaces |
| 0636102489 | CAP SCREW | Fastener for housing joint bolts (M12) |
| 4656301148 | FIXING PLATE | Retainer for clutch piston assembly |
| 0636102463 | CAP SCREW | Fastener for valve body mounting |
| 4657201133 | SCREEN SHEET | Oil filter mesh for hydraulic circuit |
| 0636115287 | CAP SCREW | Fastener for oil pan attachment |
| 4657301065 | PLATE | Spacer plate for clutch pack adjustment |
