Overview
The ZF 4168.028.209 CONVERTER Torque Converter Assembly is a complete, factory-matched unit designed to transfer and multiply engine torque within ZF powershift transmissions. This critical component sits between the engine flywheel and the transmission input shaft, using hydraulic fluid coupling to provide smooth power delivery and torque multiplication during low-speed operation. As a direct replacement for the OEM assembly, the SKU 4168.028.209 ensures precise lock-up characteristics and thermal stability under heavy loads. When rebuilding a transmission, it is common to inspect the 4660198001: PERIPHERALS kit and the 0501209818: RANGE SELECTOR assembly simultaneously, as these components work in tandem with the torque converter to manage gear engagement.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration: Worn internal clutch plates or damaged stator bearings cause noticeable shaking when the converter locks up, often mistaken for driveline issues.
- Transmission fluid overheating and darkening: A failing torque converter generates excessive heat due to internal slippage, leading to burnt-smelling fluid and potential damage to the 4660101011: TRANSMISSION HOUSING.
- Delayed or harsh gear engagement: When the converter fails to maintain proper hydraulic pressure, operators experience a lag between shifting and actual gear engagement, particularly in forward-to-reverse transitions.
- Audible whining or grinding noise from the bell housing: Worn needle bearings or a damaged impeller hub produce metallic sounds that intensify with engine RPM, indicating imminent converter failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4168.028.209 |
| Type | Complete Torque Converter Assembly |
| Overall Diameter | ~340 mm (13.4 in) |
| Overall Length | ~180 mm (7.1 in) |
| Weight | ~22.5 kg (49.6 lbs) |
| Housing Material | High-strength cast iron with steel impeller |
| OEM Reference | ZF 4168.028.209 |
| Fluid Capacity | ~1.8 liters (0.48 gal) |
Compatibility
This torque converter assembly is engineered for ZF WG series powershift transmissions, specifically the WG 200 Series, WG 92 Series, and WG 98 Series. It is also compatible with the WG180 and WG190 models found in construction and agricultural machinery. The unit interfaces directly with the 4660301018: HOUSING and requires proper alignment with the transmission pump drive. For complete rebuilds, verify that the 0631306174: CYLINDRICAL PIN and 0769123894: TYPE PLATE are replaced to ensure correct indexing and identification.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | External seals and gaskets for converter housing |
| 0501209818 | RANGE SELECTOR | Controls gear range engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4660301018 | HOUSING | Converter bell housing adapter |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for converter mounting |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 4660221012 | SUCTION TUBE | Oil pickup tube from sump to pump |
| 0634100317 | O-RING | Seal between converter and housing |
| 0636103273 | CAP SCREW | Fastener for converter cover plate |
| 0750100022 | SCREW PLUG | Drain plug for converter cavity |
