Overview
The ZF 4651.006.013 6 WG 100(500) Powershift Transmission Assembly | Complete Unit is a fully assembled drop-in replacement designed for heavy-duty off-highway applications. This complete unit integrates the clutch packs, planetary gearsets, and hydraulic control system into a single, pre-tested assembly. The SKU 4651.006.013 corresponds to the 6-speed version of the WG 100 series, offering a 500 Nm torque capacity. It sits as the central power transfer module between the engine and the driveline, replacing the entire internal rotating assembly. For proper sealing and structural integrity, this unit is installed alongside the 4651101007: TRANSMISSION HOUSING and the 4651301029: HOUSING.
Symptoms of Failure
- Erratic shifting or gear slippage under load: When the internal clutch packs wear, the transmission may hesitate or slip when moving from forward to reverse, especially in heavy equipment.
- Internal oil leaks pooling in the bell housing: Worn seals within the assembly allow hydraulic fluid to bypass, leading to low pressure and visible drips near the 0634303928: O-RING interface.
- Delayed engagement after shifting: A failing torque converter or worn spool valves cause a 2-3 second lag before the transmission engages, reducing productivity.
- Metallic grinding noise from the transmission case: Bearing or gear tooth damage inside the assembly produces a distinct grinding sound, often accompanied by metal particles in the oil filter.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4651.006.013 |
| Series | WG 100 (500 Nm) |
| Number of Speeds | 6 Forward / 1 Reverse |
| Dry Weight (approx.) | 145 kg (320 lbs) |
| Overall Length | 620 mm |
| Housing Material | Cast Iron (GGG-40) |
| Max Input Torque | 500 Nm |
| Oil Capacity | 12.5 liters (with filter) |
| Mounting Pattern | SAE 3 (Bell Housing) |
Compatibility
This complete unit is engineered for the ZF WG 100 series transmissions, specifically the 6 WG 100(500) variant. It is also compatible with the WG 180 and WG 200 series when used with the appropriate 4651301024: HOUSING adapter. Applications include telescopic handlers, wheel loaders, and agricultural tractors from manufacturers such as Manitou, JCB, and Claas. Always verify the bell housing pattern and input shaft spline count before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4651301029 | HOUSING | Rear cover housing for output shaft support |
| 0634303928 | O-RING | Seals the housing joint to prevent fluid leaks |
| 4651301024 | HOUSING | Adapter housing for WG 180/200 compatibility |
| 4651203002 | SCREEN SHEET | Fine mesh filter for hydraulic oil return line |
| 4651303005 | SCREEN SHEET | Coarse mesh pre-filter for pump suction |
| 0636101032 | CAP SCREW | M12 bolt for securing housing flanges |
| 0630361028 | SEALING CAP | Plugs unused hydraulic ports |
| 4475280060 | SCREW PLUG | Drain or fill port plug with copper washer |
| 0634303312 | O-RING | Seals the screw plug to prevent oil seepage |
