Overview
The ZF 4166.034.181 CONVERTER Torque Converter Assembly is a critical hydraulic coupling component that transfers engine torque to the transmission gear train while multiplying rotational force during low-speed operation. Positioned between the engine flywheel and the transmission input shaft, this complete unit ensures smooth power delivery in heavy-duty industrial drivetrains. The SKU 4166.034.181 is engineered as a direct replacement for worn or failed assemblies, restoring original performance characteristics in ZF WG-series transmissions.
Symptoms of Failure
- Torque converter shudder during acceleration — A noticeable vibration or shaking when the vehicle moves from a standstill, often caused by worn clutch friction material or degraded lock-up functionality.
- Transmission fluid overheating and darkening — Internal stator failure or excessive slippage generates abnormal heat, leading to burnt-smelling 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 between first and second gears.
- Audible whining or grinding noise from bell housing — Worn bearings or damaged impeller blades produce metallic sounds that intensify with engine RPM.
Technical Specifications
| Parameter | Value |
|---|---|
| Overall Diameter | 340 mm (13.4 in) |
| Overall Height | 185 mm (7.3 in) |
| Weight (dry) | 12.8 kg (28.2 lbs) |
| Housing Material | Aluminum alloy with steel hub insert |
| Impeller Blade Count | 29 (pump), 27 (turbine), 31 (stator) |
| OEM Reference | ZF 4166.034.181 |
| Max Input Torque | 1,200 Nm (885 lb-ft) |
| Lock-up Clutch Type | Wet multi-plate with damper spring |
Compatibility
This torque converter assembly is designed for ZF WG-series powershift transmissions commonly used in construction, mining, and agricultural equipment. It directly fits the WG 160 Series, WG 171 Series, WG 190 Series, WG 191 Series, WG 210 Series, and WG 211 Series. The unit also serves as a service replacement for earlier WG180 and WG200 variants when paired with the correct 4656101056 TRANSMISSION HOUSING and 4656201075 HOUS.FRONT SECT. For complete assembly, ensure the 4656201077 HOUSING REAR PART and 4656298049 HOUSING REAR SECTION are inspected for wear during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Encloses and supports gear train and converter assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft and pump drive |
| 4656201077 | HOUSING REAR PART | Rear housing section covering output shaft area |
| 4656298049 | HOUSING REAR SECTION | Extended rear housing for PTO or auxiliary drives |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-converter positioning |
| 4656301148 | FIXING PLATE | Retains converter stator support in housing bore |
| 0636100817 | CAP SCREW | M12 bolt for securing fixing plate to housing |
| 4656301016 | SCREEN SHEET | Fine mesh filter for converter circuit oil return |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for main oil flow |
| 0636100803 | CAP SCREW | M10 bolt for screen sheet retention |
Frequently Asked Questions
Q: Can this converter be rebuilt, or must it be replaced as a complete unit?
A: The ZF 4166.034.181 is a sealed assembly; internal stator and clutch components are not serviceable separately. Replacement as a complete unit is recommended to ensure proper balance and hydraulic performance.
Q: What transmission fluid is compatible with this torque converter?
A: Use ZF TE-ML 03 or 07 approved fluids (such as Shell Spirax S4 TXM or equivalent). Avoid universal tractor fluids, as they lack the friction modifiers required for lock-up clutch durability.
Q: How does this part interact with the transmission housing during installation?
A: The converter pilot fits into the 4656101056 TRANSMISSION HOUSING front bore. Always verify that the 4656201075 HOUS.FRONT SECT and 4656201077 HOUSING REAR PART are free of cracks or distortion before bolting the converter in place.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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