Overview
The ZF 4657.066.300 6 WG 211 Powershift Transmission Assembly is a complete, factory-grade unit designed for heavy-duty off-highway machinery. As the core torque-converter and gearbox assembly in the WG 211 series, this SKU 4657.066.300 integrates the planetary gear sets, clutch packs, and hydraulic valve body into a single, ready-to-install package. This assembly directly replaces the worn-out core of your transmission, restoring full power flow from the engine to the driveline. For a full rebuild, ensure the 4657101087: TRANSMISSION HOUSING is inspected for cracks, as it forms the structural backbone of this unit.
Symptoms of Failure
- Erratic gear engagement or slipping under load: When the internal clutch packs or seals within the 4657.066.300 degrade, the transmission fails to hold pressure, causing the machine to lurch or lose torque during operation.
- Contaminated transmission fluid with metallic debris: Worn bearings or gear teeth inside the assembly shed metal particles, which circulate through the system and accelerate damage to the 4657301172: HOUS.FRONT SECT and valve body.
- Delayed or no forward/reverse engagement: A failing torque converter or worn spool valves in the complete unit cause a significant lag (2-5 seconds) before the transmission responds to shift commands.
- External oil leaks at the main case seams: Gasket failure or stress fractures in the assembly allow hydraulic oil to weep from the joint between the front and rear sections, often requiring replacement of the 4657301173: HOUSING REAR PART.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.066.300 |
| Assembly Type | 6 WG 211 Powershift (Complete Unit) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Primary Material | High-grade cast iron & alloy steel |
| OEM Reference | ZF 4657.066.300 |
| Torque Converter Type | Single-stage, 3-element |
| Number of Speeds | 6 forward / 3 reverse |
| Mounting Interface | SAE 3 (standard) |
Compatibility
This complete unit is specifically engineered for the ZF WG 211 series, but its core architecture shares design lineage with the WG 180 and WG 200 families. It is a direct fit for models such as the WG 211, WG 211 E, and WG 211 S. While the 0631306816: CYLINDRICAL PIN is used for precise alignment during installation, the assembly itself is not interchangeable with the smaller WG 150 series without significant adapter modifications. Always verify the bellhousing pattern against your existing unit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101087 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4657301172 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657301173 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for case assembly |
| 0636102489 | CAP SCREW | Fastener for housing sections |
| 4656301148 | FIXING PLATE | Locks clutch pack retaining nuts |
| 0636102463 | CAP SCREW | Bolt for valve body attachment |
| 4657201133 | SCREEN SHEET | Filter mesh for hydraulic circuit |
| 0636115287 | CAP SCREW | High-tensile bolt for planetary carrier |
| 4657301065 | PLATE | Thrust washer for gear spacing |
