Overview
The ZF 4166.034.080 CONVERTER Torque Converter Assembly is a critical hydraulic component that transfers engine torque to the transmission input shaft within ZF WG series powershift transmissions. This complete unit replaces the original torque converter assembly, ensuring smooth power delivery and efficient torque multiplication during low-speed operation. The SKU 4166.034.080 is a direct-fit assembly designed to restore driveline performance in heavy-duty industrial applications. It sits between the engine flywheel and the transmission pump, converting rotational energy into hydraulic pressure for seamless gear engagement.
Symptoms of Failure
- Torque converter shudder or vibration during acceleration: Worn internal stator or clutch components cause noticeable shaking when the converter locks up, especially under load.
- Transmission overheating and fluid darkening: A failing converter generates excessive heat, leading to burnt transmission fluid and reduced lubrication efficiency.
- Delayed or harsh gear engagement: When the converter fails to maintain proper hydraulic pressure, shifts become sluggish or abrupt, particularly from neutral to drive.
- Oil leaks near the bell housing: Damaged seals or cracks in the converter hub allow transmission fluid to escape, leaving puddles under the vehicle.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 4166.034.080 |
| Product Type | Torque Converter Assembly (Complete Unit) |
| Overall Diameter | 340 mm (13.4 in) |
| Weight | 18.5 kg (40.8 lbs) |
| Housing Material | High-strength cast iron with hardened steel stator |
| OEM Reference | ZF 4166.034.080 |
| Seal Type | Viton O-ring (compatible with 0634313514: O-RING) |
| Fastener Torque Spec | Use 0636100803: CAP SCREW (M10 x 1.5, 45 Nm) |
Compatibility
This torque converter assembly is engineered for ZF WG 171, WG 190, WG 191, WG 210, and WG 211 series transmissions. It directly replaces the original converter in WG180 and WG200 variants as well, provided the bell housing pattern matches. For proper installation, ensure the 4656101030: TRANSMISSION HOUSING is free of cracks and the 4656301066: HOUS.FRONT SECT aligns correctly with the converter pilot. Always inspect the 4656201015: SCREEN SHEET for debris and replace the 4656301037: TUBE if worn to prevent contamination.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Encloses and supports all internal transmission components |
| 4656301066 | HOUS.FRONT SECT | Front section housing that aligns the torque converter and pump |
| 4656201015 | SCREEN SHEET | Fine mesh filter protecting the converter from debris |
| 4656301037 | TUBE | Fluid passage tube connecting converter to cooler circuit |
| 0634313514 | O-RING | Seals the converter hub to prevent fluid leaks |
| 0636100803 | CAP SCREW | Fastens the converter to the flexplate (M10) |
| 4656301064 | HOUSING REAR PART | Rear housing section supporting the output shaft |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for precise housing assembly |
| 0636100801 | CAP SCREW | Fastener for front housing section (M8) |
| 0636100160 | CAP SCREW | Fastener for rear housing section (M12) |
Frequently Asked Questions
Q: Can the ZF 4166.034.080 torque converter be rebuilt, or must it be replaced as a complete unit?
A: While some internal components like the stator or clutch can be serviced, the 4166.034.080 is designed as a sealed, balanced assembly. ZF recommends replacing the complete unit to ensure proper hydraulic performance and avoid imbalance issues.
Q: What is the typical lifespan of this torque converter in a WG 191 series transmission?
A: Under normal operating conditions with proper fluid maintenance, the converter can last 8,000 to 12,000 hours. Contaminated fluid or frequent heavy loading will reduce service life significantly.
Q: Do I need to replace the O-ring and cap screws when installing this converter?
A: Yes. Always install a new 0634313514: O-RING and use fresh 0636100803: CAP SCREW fasteners to prevent leaks and ensure correct torque retention.
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Phone: +86 158 2286 3467 |
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