Overview
The ZF 4651.033.007 3 WG 100 Powershift Transmission Assembly represents a complete, drop-in replacement unit engineered for heavy-duty industrial applications. This fully assembled transmission integrates the main gear train, clutch packs, and hydraulic control system into a single robust package. As the core power transfer component in the WG 100 series, this assembly manages torque distribution across multiple speeds, ensuring smooth directional shifts under load. The SKU 4651.033.007 is a direct OEM-spec unit, designed to restore original performance in ZF powershift systems. It works in concert with the TRANSMISSION HOUSING to contain internal pressures, while the HOUSING provides structural integrity for the valve body interface.
Symptoms of Failure
When the ZF 4651.033.007 assembly begins to degrade, operators typically notice these specific failure modes:
- Delayed or harsh engagement: A worn assembly causes hesitation when shifting from neutral to forward or reverse, often accompanied by a jarring clunk.
- Internal oil leaks: Degraded seals within the unit allow transmission fluid to bypass, leading to low pressure and visible drips around the bell housing. Replacing the O-RING during installation is critical to prevent this.
- Gear slipping under load: As clutch pack friction material wears, the transmission loses torque capacity, causing RPM flare without corresponding vehicle movement.
- Unusual whining or grinding noises: Bearing wear inside the assembly produces a metallic sound that intensifies with engine speed.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4651.033.007 |
| Assembly Type | Complete Powershift Transmission (3 WG 100) |
| Dry Weight | Approx. 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 560 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| OEM Reference | ZF 4651.033.007 / 3 WG 100 |
| Seal Kit Compatibility | Includes O-RING (0634303928) |
Compatibility
This complete unit is specifically engineered for the ZF WG 100 series powershift transmissions. It is a direct fit for models including the WG 100, WG 120, and WG 150 variants used in industrial loaders, forklifts, and mobile cranes. The assembly also shares mounting interfaces with the HOUSING found in later WG 180 and WG 200 series, though internal gear ratios differ. Always verify your transmission model tag before ordering. For optimal sealing, pair this unit with the O-RING (0634303928) to prevent fluid migration between the housing and valve body.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101006 | TRANSMISSION HOUSING | Main structural casing for gear and clutch assembly |
| 4651301034 | HOUSING | Valve body and control housing cover |
| 0634303928 | O-RING | Seals housing joint to prevent oil leaks |
| 4651301013 | HOUSING | Rear housing section for output shaft support |
| 4651301015 | SCREEN SHEET | Filter screen for hydraulic fluid intake |
| 4651301035 | SCREEN SHEET | Secondary filter screen for return line |
| 0630361028 | SEALING CAP | Closes unused hydraulic ports |
| 4475280060 | SCREW PLUG | Seals threaded oil gallery openings |
| 0634303312 | O-RING | Seals screw plug and cap interfaces |
| 0630361063 | SEALING CAP | High-pressure port sealing cap |
