Overview
The ZF 4651.033.010 3 WG 100 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This fully assembled gearbox integrates the clutch packs, planetary gearsets, and hydraulic control system into a single, ready-to-install package. As the core of the WG 100 series, this assembly manages torque distribution across multiple speeds, ensuring smooth directional shifts under load. The SKU 4651.033.010 is a direct OEM replacement, eliminating the need for piecemeal rebuilding. When installing this unit, always inspect the mating TRANSMISSION HOUSING for cracks or warpage, as housing integrity is critical for alignment.
Symptoms of Failure
- Delayed or harsh engagement: A worn 4651.033.010 assembly often causes a noticeable lag when shifting from neutral to forward or reverse, followed by a jarring engagement. This indicates internal clutch pack wear or hydraulic pressure loss.
- Oil leaks at the bell housing interface: If you observe transmission fluid pooling near the engine-transmission joint, the main seal or gasket within the assembly has failed. This is a common failure mode for high-hour units.
- Gear slipping under load: The transmission may momentarily lose power during acceleration or when climbing grades. This slipping is a direct result of worn friction discs or damaged piston seals inside the 4651.033.010.
- Unusual whining or grinding noises: Metallic sounds during operation, particularly in lower gears, suggest bearing failure or planetary gear damage within the assembly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4651.033.010 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 100 |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 550 mm |
| Housing Material | High-Strength Cast Iron |
| OEM Reference | ZF 3 WG 100 |
| Seal Type | Viton O-Rings |
Compatibility
This 4651.033.010 assembly is engineered specifically for the ZF WG 100 series of powershift transmissions. It is a direct fit for models including the WG 100, WG 120, and WG 150. While the WG 180 and WG 200 share similar hydraulic architecture, this particular unit is not cross-compatible due to differences in bell housing bolt patterns and output shaft spline counts. For WG 180 or WG 200 applications, verify the housing variant before ordering. During installation, ensure the HOUSING and HOUSING components are free of debris, and replace the O-RING at every service interval to prevent fluid bypass.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101015 | TRANSMISSION HOUSING | Main structural casing for gear alignment |
| 4651301039 | HOUSING | Intermediate support housing for clutch packs |
| 0634303928 | O-RING | Static seal for hydraulic pressure retention |
| 4651301013 | HOUSING | Rear housing for output shaft support |
| 4651301015 | SCREEN SHEET | Fine mesh filter for hydraulic fluid |
| 4651301035 | SCREEN SHEET | Secondary filter screen for debris capture |
| 0630361028 | SEALING CAP | Protective cap for hydraulic test ports |
| 4475280060 | SCREW PLUG | Threaded plug for drain or fill holes |
| 0634303312 | O-RING | Dynamic seal for rotating shafts |
| 0630361063 | SEALING CAP | High-temperature cap for breather vents |
