Overview
The ZF 4656.183.330 LOOSE PARTS for WG171 is a critical service kit designed to restore the internal sealing and structural integrity of your ZF WG series transmission. This OEM genuine part, identified by SKU 4656.183.330, contains the essential loose hardware and small components that secure and seal the main housing assembly. It sits directly within the transmission’s central casing, working in conjunction with the TRANSMISSION HOUSING and the HOUS.FRONT SECT to prevent fluid migration and maintain proper gear alignment. Without this kit, the transmission cannot achieve the necessary clamping force for the internal oil circuits.
Symptoms of Failure
When the components within the 4656.183.330 kit begin to degrade, operators will notice specific operational issues. Oil leaks at the front housing joint are the most common early indicator, often appearing as drips near the bell housing. Erratic gear engagement or delayed shifting occurs when internal seals lose tension, allowing hydraulic pressure to bleed off. A third symptom is abnormal vibration during torque converter lockup, caused by loose fasteners that allow the SCREEN SHEET to shift out of position. Finally, contaminated transmission fluid with metallic particles signals that a worn TUBE within the kit has begun to abrade against rotating assemblies.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4656.183.330 |
| OEM Reference | ZF 4656.183.330 (Genuine) |
| Material Composition | Steel (fasteners), Nitrile Rubber (seals), Aluminum (spacers) |
| Weight (approx.) | 0.85 kg (1.87 lbs) |
| Kit Contents | Bolts, O-rings, dowel pins, and tube assembly |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This LOOSE PARTS kit is specifically engineered for the ZF WG 171 series transmissions. However, due to the shared architecture of the WG family, it is also compatible with the WG 180 and WG 200 models when used in conjunction with the correct HOUSING REAR PART. It is not backward compatible with the older WG 150 series without additional modifications. Always verify your transmission’s serial number against the ZF parts catalog to ensure the O-RING and CAP SCREW dimensions match your specific assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101028 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4656301066 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4656201015 | SCREEN SHEET | Filter screen for hydraulic fluid intake |
| 4656301037 | TUBE | Oil delivery tube between valve body and clutch |
| 0634313514 | O-RING | Seals fluid passages in housing joints |
| 0636100803 | CAP SCREW | Secures housing sections together |
| 4656301042 | HOUSING REAR PART | Rear casing for output shaft support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0636100801 | CAP SCREW | Fastener for oil pan attachment |
| 0636100160 | CAP SCREW | Bolt for valve body mounting |
Frequently Asked Questions
Q: Can I reuse the old O-rings from my previous rebuild when installing this kit?
A: No. The 4656.183.330 kit is designed as a complete replacement set. Reusing old elastomers will compromise the seal integrity and lead to immediate fluid leaks. Always install the new O-RING provided in the kit.
Q: Does this part include the cap screws for the rear housing?
A: Yes. The kit contains the necessary CAP SCREW fasteners for the main housing sections. However, the CAP SCREW for the valve body is sold separately if needed.
Q: How do I know if my WG171 needs this specific loose parts kit?
A: If you are disassembling the transmission and notice corrosion on the CYLINDRICAL PIN or damage to the TUBE, this kit is mandatory for a proper rebuild. It is also recommended for any transmission that has exceeded 500,000 miles without a major overhaul.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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