Overview
This OEM genuine ZF 4657.176.019 COUPLING is a critical driveline component engineered for the WG 190 and WG 210 series transmissions. It functions as the primary torque-transfer interface between the engine output and the transmission input shaft, ensuring smooth power delivery and torsional vibration dampening. The coupling sits directly within the bell housing assembly, where it connects to the TRANSMISSION HOUSING and aligns with the HOUS.FRONT SECT to maintain precise axial positioning. The SKU 4657.176.019 is manufactured to ZF’s exacting OEM tolerances, guaranteeing a direct fit without modification.
Symptoms of Failure
- Torque fluctuation under load: Worn coupling splines cause intermittent power loss during acceleration, often described as “shuddering” or “chattering” at highway speeds.
- Transmission fluid seepage near bell housing: Degraded coupling seals allow ATF to leak past the HOUSING REAR PART joint, leaving visible drips on the transmission pan.
- Metallic grinding noise during gear engagement: Broken coupling dampers produce a distinct rattle when shifting from Park to Drive or Reverse.
- Increased driveline backlash: Excessive free play in the coupling hub causes a noticeable “clunk” when taking up slack in the drivetrain.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4657.176.019 |
| Outer Diameter | 180 mm (7.09 in) |
| Inner Spline Diameter | 45 mm (1.77 in) |
| Overall Length | 95 mm (3.74 in) |
| Material | Forged steel with nitrile rubber dampers |
| Weight | 2.8 kg (6.17 lbs) |
| Bolt Torque Spec | 85 Nm (62.7 ft-lbs) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This coupling is specifically designed for ZF WG 190 and WG 210 series transmissions. It is also compatible with the WG 180, WG 200, and WG 220 models when used with the correct CYLINDRICAL PIN alignment kit. The part replaces superseded numbers 4657.176.018 and 4657.176.017. Always verify your transmission’s serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101033 | TRANSMISSION HOUSING | Encloses gear train and supports coupling assembly |
| 4657201027 | HOUS.FRONT SECT | Front section housing that aligns coupling with input shaft |
| 4657201012 | HOUSING REAR PART | Rear housing section that seals coupling cavity |
| 0631306792 | CYLINDRICAL PIN | Locating pin for precise coupling alignment |
| 0636100801 | CAP SCREW | M10 bolt for securing coupling to flywheel |
| 4656301148 | FIXING PLATE | Retains coupling hub on input shaft |
| 4657301032 | SCREEN SHEET | Fine mesh filter for coupling lubrication circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for oil feed |
| 0636100803 | CAP SCREW | M12 bolt for coupling-to-housing attachment |
| 4681301040 | OIL FEED.HOUSG. | Pressurized oil supply line to coupling dampers |
Frequently Asked Questions
Q: Can I install this coupling without removing the transmission?
A: No. The coupling sits between the engine and transmission, requiring full transmission removal and separation of the HOUS.FRONT SECT for access.
Q: What is the typical service life of part 4657.176.019?
A: Under normal operating conditions, expect 150,000–200,000 miles. Heavy towing or frequent stop-start cycles may reduce this to 100,000 miles.
Q: Does this coupling include the required bolts?
A: No. You must order the CAP SCREW (0636100801) and CAP SCREW (0636100803) separately for a complete installation.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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