Overview
The ZF 4660.023.002 WG 98 TS Powershift Transmission Assembly represents a complete, drop-in replacement unit engineered for heavy-duty off-highway machinery. As the core hydraulic-mechanical assembly in the WG 98 Series, this SKU integrates the clutch packs, planetary gearsets, and valve body into a single ready-to-install package. The 4660.023.002 unit is designed to transfer engine torque through multiple power paths, enabling smooth direction changes and speed shifts under full load. It sits directly between the engine bellhousing and the final drive, with the 4660101006: TRANSMISSION HOUSING enclosing the rotating components and the 4660301014: HOUSING II securing the rear clutch assembly. This complete assembly eliminates the need for piecemeal rebuilding, offering a factory-balanced solution for ZF powershift systems.
Symptoms of Failure
- Delayed or harsh engagement when shifting from neutral to forward: Worn clutch discs or degraded seals inside the 4660.023.002 cause pressure loss, resulting in a noticeable lag or a jarring “clunk” during gear engagement.
- Transmission overheating under moderate load: Internal leakage past the piston seals or a failing torque converter lockup clutch generates excessive heat, often indicated by a rising temperature gauge or burnt transmission fluid odor.
- Intermittent loss of drive in higher gears (3rd or 4th): A failing planetary carrier or worn splines on the output shaft within this assembly can cause the transmission to suddenly slip or lose power delivery, especially when climbing grades.
- External oil seepage from the bellhousing or rear seal area: Cracks in the 4660101006: TRANSMISSION HOUSING or a compromised gasket allow ATF to weep, leaving visible drips and lowering fluid levels.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.023.002 |
| Assembly Type | WG 98 TS Powershift Transmission (Complete Unit) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| OEM Reference | ZF WG 98 Series |
| Max Input Torque | 980 Nm |
| Fluid Capacity | 14.5 liters (ATF Dexron III) |
| Mounting Configuration | SAE 3 bellhousing pattern |
Compatibility
This 4660.023.002 complete unit is specifically engineered for the ZF WG 98 TS powershift family, which includes the WG180, WG200, and WG210 models commonly found in telehandlers, wheel loaders, and industrial tractors. It is a direct fit for machines originally equipped with the WG 98 series transmission, such as those from JCB, Manitou, and Claas. The assembly interfaces with the 0631306174: CYLINDRICAL PIN for precise alignment of the housing halves, and the 0769123894: TYPE PLATE is affixed to the exterior for serial number identification. Always verify your transmission model tag before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101006 | TRANSMISSION HOUSING | Encloses the main gear train and valve body |
| 4660301014 | HOUSING II | Rear housing supporting the output shaft and clutches |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing-to-housing fit |
| 0769123894 | TYPE PLATE | Identification plate with model and serial number |
| 0750100022 | SCREW PLUG | Seals fluid drain/fill ports in the housing |
| 4660221013 | TUBE | Internal oil delivery tube for clutch lubrication |
| 0634100317 | O-RING | Seals the tube-to-housing connection |
| 0636103273 | CAP SCREW | Fastens the housing halves together |
| 0634306311 | O-RING | Seals the cap screw and prevents fluid bypass |
| 4660321029 | FIXING PLATE | Retains the valve body or shift fork assembly |
