Overview
The ZF 4651.006.010 6 WG 100(500) Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single, ready-to-install package. As the core power transfer module in the WG 100 series, it converts engine torque into precisely controlled wheel or implement motion. The SKU 4651.006.010 is specifically calibrated for the 6-speed, 500 Nm variant, ensuring optimal shift quality under extreme loads. When replacing this assembly, always inspect the 4651101007: TRANSMISSION HOUSING for cracks or wear, as it provides the structural foundation for the entire unit.
Symptoms of Failure
- Delayed or harsh engagement – If the transmission hesitates before moving forward or reverse, or slams into gear, the internal clutch packs or valve body within the 4651.006.010 assembly may be failing.
- Torque converter shudder under load – A vibration or shudder during acceleration, especially when climbing grades, indicates worn friction discs or a failing stator in the powershift unit.
- Intermittent loss of drive – The machine may suddenly lose power to the wheels, then regain it, often caused by hydraulic pressure loss from a damaged seal or piston inside the assembly.
- Contaminated transmission fluid – Dark, burnt-smelling oil with metallic particles suggests internal wear of gears or bearings within the 4651.006.010, requiring immediate replacement of the complete unit.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4651.006.010 |
| Assembly Type | Complete Powershift Unit (6 WG 100(500)) |
| Weight (approx.) | 185 kg (408 lbs) |
| Dimensions (L x W x H) | 620 mm x 480 mm x 410 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4651.006.010 |
| Torque Capacity | 500 Nm (369 lb-ft) |
| Speed Range | 6 forward / 3 reverse |
Compatibility
This 4651.006.010 assembly is engineered for the ZF WG 100 series of powershift transmissions. It directly replaces units in the WG 100(500) variant. While primarily designed for the WG 100, it is also compatible with select WG 180 and WG 200 models that share the same bellhousing pattern and input shaft spline count, though output torque ratings may differ. Always verify the transmission model plate before installation. For proper sealing during reassembly, use the 0634303928: O-RING on the main housing joint. Additionally, the 4651301029: HOUSING and 4651301024: HOUSING are critical structural components that must be inspected for distortion when mounting this assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301029 | HOUSING | Rear cover housing for output shaft |
| 0634303928 | O-RING | Seals housing joint to prevent fluid leaks |
| 4651301024 | HOUSING | Intermediate housing for clutch pack support |
| 4651203002 | SCREEN SHEET | Filters debris from hydraulic oil flow |
| 4651303005 | SCREEN SHEET | Secondary filter for valve body circuit |
| 0636101032 | CAP SCREW | Fastens housing sections together |
| 0630361028 | SEALING CAP | Closes unused hydraulic ports |
| 4475280060 | SCREW PLUG | Seals drain and fill holes |
| 0634303312 | O-RING | Seals screw plug and cap interfaces |
