Overview
The ZF 4660.013.018 WG 98 TC Powershift Transmission Assembly is a complete, ready-to-install unit designed for heavy-duty industrial applications. This assembly integrates the torque converter and gear train into a single, sealed housing, providing reliable power transfer in construction, mining, and material handling equipment. The SKU 4660.013.018 is a direct replacement for the original WG 98 series assembly, ensuring seamless integration with existing drivelines. It sits as the central power distribution module within the transmission system, connecting the engine output to the final drive. For optimal sealing and structural integrity, this unit is paired with the 4660101020: TRANSMISSION HOUSING and the 4660301056: HOUSING II, which form the outer casing and support the internal components.
Symptoms of Failure
- Delayed or harsh gear engagement: When the WG 98 TC assembly wears, operators may notice a pronounced lag when shifting from neutral to drive or reverse, often accompanied by a jarring engagement. This is a common symptom of internal clutch pack degradation or torque converter wear.
- Torque converter shudder at low speeds: A rhythmic vibration or shudder during low-speed maneuvering, such as when loading or unloading, indicates failing stator or turbine components within the assembly. This issue often worsens under load.
- Transmission fluid contamination with metallic debris: Visible metal particles in the oil filter or on the dipstick signal internal bearing or gear wear. This symptom frequently accompanies a loss of hydraulic pressure and slipping in higher gears.
- Oil leaks from the bell housing area: Leaks originating near the torque converter seal or the housing mating surfaces suggest seal failure or housing distortion. This can lead to low fluid levels and eventual transmission failure if not addressed promptly.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4660.013.018 |
| Assembly Type | WG 98 TC Powershift Transmission (Complete Unit) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast Iron (GGG-40) |
| Torque Converter Diameter | 340 mm |
| OEM Reference | ZF WG 98 TC |
| Mounting Bolt Torque | 120 Nm (88.5 lb-ft) |
Compatibility
This complete assembly is engineered for the ZF WG 98 series of powershift transmissions. It is directly compatible with models including the WG180, WG200, and WG210, which are commonly found in wheel loaders, forklifts, and telehandlers from manufacturers such as Caterpillar, Volvo, and JCB. The 4660.013.018 assembly replaces earlier WG 98 variants and can be retrofitted with minor modifications. For proper installation, ensure the 0631306174: CYLINDRICAL PIN is correctly aligned to secure the housing halves, and affix the 0769123894: TYPE PLATE for identification after assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101020 | TRANSMISSION HOUSING | Main outer casing for the gear train |
| 4660301056 | HOUSING II | Secondary housing for torque converter section |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0769123894 | TYPE PLATE | Identification and rating plate |
| 0750100022 | SCREW PLUG | Seals oil drain/fill ports |
| 4660221031 | SUCTION TUBE | Oil pick-up from sump to pump |
| 0634100317 | O-RING | Seal for suction tube connection |
| 0636103273 | CAP SCREW | Fastener for housing bolts |
| 0634306311 | O-RING | Seal for cap screw ports |
| 4660321029 | FIXING PLATE | Retains internal clutch packs |
