Overview
This genuine ZF 4475.280.092 SCREW-IN SLEEVE is a precision-engineered fastening component designed for the WG100, WG130, and WG131 transmission series. It functions as a threaded locking element that secures internal shafts and gear assemblies within the transmission housing. The sleeve prevents axial movement of rotating components, ensuring that the 2094104412 MAIN SHAFT and 2094304054 MAIN SHAFT remain properly aligned under high torque loads. As an OEM genuine part, SKU 4475.280.092 meets ZF’s original manufacturing tolerances for thread pitch, hardness, and corrosion resistance.
Symptoms of Failure
- Transmission oil seepage at the housing joint: A worn or cracked screw-in sleeve can allow pressurized ATF to escape, leaving visible drips under the bell housing.
- Gear engagement hesitation or “slipping”: When the sleeve loses its clamping force, the 2094106010 SHIFT SYSTEM may experience delayed response during upshifts.
- Abnormal driveline vibration: A loose sleeve permits micro-movement of the 2094206001 GEARSHIFT SHAFT, creating harmonic vibrations at highway speeds.
- Metallic debris in the oil pan: Stripped threads from a failing sleeve generate fine steel particles that contaminate the hydraulic system.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4475.280.092 |
| OEM Reference | ZF 4475.280.092 |
| Material | Case-hardened steel (16MnCr5) |
| Thread Size | M30 x 1.5 |
| Overall Length | 42 mm |
| Hex Drive Size | 10 mm internal hex |
| Weight | 0.085 kg |
| Surface Treatment | Zinc-nickel plated (DIN EN 13811) |
| Torque Spec | 85 Nm + 90° angle |
Compatibility
This screw-in sleeve is engineered for the ZF WG series of powershift transmissions. It is directly compatible with the WG100, WG130, and WG131 models. Based on its thread geometry and load rating, it may also fit the WG180 and WG200 series when used in auxiliary drive positions. Always verify fitment against your transmission’s parts catalog before installation. For related fastening components, consider the 0630513070 SNAP RING and 2094306019 WASHER for complete assembly security.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2094104412 | MAIN SHAFT | Primary torque transfer shaft |
| 2094304054 | MAIN SHAFT | Secondary shaft for gear reduction |
| 2094106010 | SHIFT SYSTEM | Hydraulic shift actuator assembly |
| 2094206001 | GEARSHIFT SHAFT | Mechanical shift linkage rod |
| 2094306053 | GEARSHIFT SHAFT | Alternate shift shaft variant |
| 0630513070 | SNAP RING | Axial retention ring |
| 2094306019 | WASHER | Load distribution spacer |
| 0732040444 | COMPRESSION SPRING | Return spring for shift forks |
| 0732040728 | COMPRESSION SPRING | Heavy-duty return spring |
| 2093206001 | BUSH | Wear sleeve for shaft support |
Frequently Asked Questions
Q: Can I reuse the old screw-in sleeve if it looks intact?
A: ZF recommends always replacing the 4475.280.092 sleeve during any major transmission overhaul. The threads experience plastic deformation during initial torqueing, so reuse risks improper clamping force and eventual loosening.
Q: Does this part require thread locker during installation?
A: No. The zinc-nickel coating provides sufficient friction retention. Applying thread locker may alter the torque-angle specification and cause over-stressing of the housing threads.
Q: How do I distinguish this sleeve from a standard bolt?
A: The 4475.280.092 has a unique internal hex drive and a shoulderless body. A standard bolt lacks the precise thread runout and case-hardened depth required for transmission applications.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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