Overview
The ZF 4664.275.002 COUPLING is a critical torque-transfer component engineered specifically for the WG160 and WG171 series transmissions. This OEM genuine part serves as the primary mechanical link between the engine output and the transmission input shaft, ensuring seamless power delivery under heavy-duty industrial loads. The SKU 4664.275.002 is precision-machined to absorb torsional vibrations and maintain driveline alignment, directly interfacing with the 4656101070: TRANSMISSION HOUSING to form a rigid assembly. Without this coupling, the transmission cannot transfer rotational force, making it a non-negotiable component for operational uptime.
Symptoms of Failure
When the ZF 4664.275.002 coupling begins to degrade, operators will notice distinct performance issues. Common failure indicators include:
- Oil leaks near the bell housing — Worn coupling seals allow transmission fluid to escape, often mistaken for a main seal failure.
- Gear slipping under load — A fatigued coupling cannot maintain positive engagement, causing intermittent power loss during acceleration.
- Metallic grinding or clunking noises — Excessive spline wear produces audible chatter, especially when shifting between forward and reverse.
- Vibration at specific RPM ranges — An unbalanced coupling transmits harmonic tremors through the driveline, worsening over time.
Technical Specifications
| Part Number | 4664.275.002 |
| Material | High-tensile alloy steel with nitrided surface |
| Weight | 2.85 kg (6.28 lbs) |
| Outer Diameter | 175 mm |
| Inner Spline Diameter | 38 mm |
| Overall Length | 92 mm |
| OEM Reference | ZF 4664.275.002 |
| Torque Capacity | 1,200 Nm |
Compatibility
This coupling is factory-specified for the ZF WG160 and WG171 transmission families. It also fits select WG180 and WG200 variants when used with the appropriate 4656201085: HOUS.FRONT SECT and 4656201089: HOUSING REAR PART. For WG200 applications, the 4656298057: HOUSING REAR SECTION must also be verified for spline alignment. Always cross-reference your transmission serial number before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101070 | TRANSMISSION HOUSING | Encloses and supports all internal gear components |
| 4656201085 | HOUS.FRONT SECT | Front section housing for input shaft bearing support |
| 4656201089 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 4656298057 | HOUSING REAR SECTION | Alternate rear housing variant for WG200 series |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-coupling positioning |
| 4656301148 | FIXING PLATE | Secures coupling to transmission input shaft |
| 0636100817 | CAP SCREW | M10 fastener for fixing plate retention |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh filter for suction line protection |
| 0636100803 | CAP SCREW | M8 fastener for screen sheet mounting |
Frequently Asked Questions
Q: Can the ZF 4664.275.002 coupling be reused after removal?
A: No. This coupling is a torque-to-yield component; reusing it risks spline failure and internal transmission damage. Always install a new OEM part during rebuilds.
Q: How do I know if my WG160 needs this coupling replaced?
A: Measure axial play at the input shaft. If movement exceeds 0.5 mm, or if you see metallic debris in the oil pan, replace the coupling immediately along with the 4656301148: FIXING PLATE.
Q: Is the 4664.275.002 compatible with the ZF WG180?
A: Yes, but only when using the 4656298057: HOUSING REAR SECTION and verifying spline count matches 38 mm inner diameter.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
