Overview
This OEM genuine ZF 4656.183.299 is a critical internal component engineered specifically for the WG 160 Series transmission. It functions as a precision-machined guide or support element within the hydraulic control assembly, ensuring correct oil flow and clutch pack engagement. The part number 4656.183.299 is manufactured to ZF’s exacting tolerances, making it essential for maintaining shift quality and torque capacity in heavy-duty commercial vehicles. When installed alongside the TRANSMISSION HOUSING (4656101056), it contributes to the structural integrity of the valve body area.
Symptoms of Failure
- Erratic or delayed gear engagement: Worn 4656.183.299 components often cause hesitation when shifting from neutral to drive or reverse, especially under load.
- Internal hydraulic pressure loss: A degraded part leads to low line pressure, resulting in soft shifts and clutch slippage during acceleration.
- Oil contamination from metal debris: As the part wears, fine metallic particles circulate through the transmission fluid, accelerating damage to bearings and seals.
- Audible whining or grinding noise: Misalignment caused by a failing 4656.183.299 can produce a high-pitched sound from the transmission housing during operation.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4656.183.299 |
| Material | High-strength sintered steel with anti-corrosion coating |
| Weight | 0.45 kg (1.0 lb) |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 42.0 mm |
| Height | 22.3 mm |
| OEM Reference | ZF 4656.183.299 (Genuine) |
Compatibility
This genuine ZF part is primarily designed for the WG 160 Series transmission, commonly found in medium-duty trucks and buses. It is also compatible with the WG 180 and WG 200 series transmissions, as these models share a common hydraulic control architecture. The 4656.183.299 interfaces directly with the HOUS.FRONT SECT (4656201075) and the HOUSING REAR PART (4656201077), forming a sealed channel for pressurized fluid. For complete rebuilds, the HOUSING REAR SECTION (4656298049) should also be inspected for wear.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for pump and converter |
| 4656201077 | HOUSING REAR PART | Rear housing for output shaft support |
| 4656298049 | HOUSING REAR SECTION | Intermediate housing section for clutch packs |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing sections |
| 4656301148 | FIXING PLATE | Retains valve body components |
| 0636100817 | CAP SCREW | Fastener for housing assembly |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | Fastener for valve body cover |
Frequently Asked Questions
Q: How do I know if the 4656.183.299 needs replacement?
A: If you observe metal shavings in the transmission pan or experience inconsistent shift pressures, this part is likely worn. Always inspect it during a full WG 160 rebuild.
Q: Can I install this part without removing the transmission?
A: No. Access to the 4656.183.299 requires removal of the transmission oil pan and valve body. In most cases, the unit must be pulled from the vehicle for proper access.
Q: Is this part interchangeable with aftermarket versions?
A: Only OEM genuine ZF 4656.183.299 parts guarantee the correct material hardness and dimensional accuracy. Aftermarket copies often fail prematurely due to inferior sintering.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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