Overview
The ZF 4660.063.016 6 WG 98 TSC Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway machinery. This assembly integrates the clutch pack, planetary gear sets, and hydraulic control components into a single, ready-to-install package. As a core element of the WG 98 Series, it manages torque distribution across six forward speeds, ensuring smooth power delivery under extreme loads. The SKU 4660.063.016 is precision-machined to OEM tolerances, making it a direct replacement for worn or failed assemblies in ZF powershift systems. This unit is often paired with the 4950101004: HOUSING to secure internal components, while the 4950301018: HOUSING I provides additional structural support for the clutch drums.
Symptoms of Failure
When the ZF 4660.063.016 assembly begins to degrade, operators may notice specific performance issues. Look for these common failure indicators:
- Delayed or harsh shifting between gears – Worn internal seals or clutch plates cause hesitation, especially when transitioning from forward to reverse.
- Oil leaks near the bell housing – A failing 0734309932: SHAFT SEAL allows transmission fluid to escape, leading to low pressure and overheating.
- Gear slipping under load – The assembly loses torque capacity, causing the machine to rev without proportional movement, particularly on inclines.
- Unusual whining or grinding noises – Damaged bearings or planetary gears inside the unit produce audible distress during operation.
Technical Specifications
| Part Number | 4660.063.016 |
| Assembly Type | Complete Powershift Transmission Assembly |
| Dimensions (L x W x H) | 620 mm x 380 mm x 420 mm (estimated) |
| Dry Weight | 145 kg (319 lbs) |
| Housing Material | High-grade cast iron with steel alloy internals |
| OEM Reference | ZF 6 WG 98 TSC |
| Seal Type | Viton double-lip shaft seal |
| Max Torque Capacity | 980 Nm (723 ft-lbs) |
Compatibility
This complete unit is engineered for the ZF WG 98 Series powershift transmissions. It is a direct fit for the following models: WG180, WG200, WG98 TSC, and WG98 TSC II. The assembly also integrates with earlier WG 80 variants when used with the 4660101023: TRANSMISSION HOUSING adapter kit. Always verify the serial number of your existing unit to ensure proper alignment with the clutch pack and hydraulic manifold.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4950101004 | HOUSING | Encloses the clutch assembly and supports the input shaft. |
| 4950301018 | HOUSING I | Provides structural support for the planetary gear set. |
| 0734309932 | SHAFT SEAL | Prevents fluid leakage at the output shaft interface. |
| 4660101023 | TRANSMISSION HOUSING | Main housing that aligns the gear train and valve body. |
| 4660301058 | HOUSING | Secondary housing for the torque converter section. |
| 0631306174 | CYLINDRICAL PIN | Locates and aligns housing halves during assembly. |
| 0750100022 | SCREW PLUG | Seals hydraulic test ports and drain holes. |
| 4660301009 | BRACKET | Mounts the transmission to the vehicle frame. |
| 4660221039 | TUBE | Routes hydraulic fluid between the pump and valve body. |
| 0636103274 | CAP SCREW | Fastens the housing and bracket assemblies securely. |
