Overview
The ZF 4656.056.169 is a critical OEM genuine component engineered specifically for the WG 160 Series transmission. This part functions as a precision-machined spacer or thrust washer, positioned within the rotating clutch or planetary gear assembly to maintain exact axial clearances. By ensuring proper load distribution and component alignment, the 4656.056.169 prevents metal-on-metal contact that can lead to premature wear. As an OEM genuine part, it guarantees factory tolerances and material composition, making it essential for any professional rebuild or repair of the WG160 gearbox. The SKU 4656.056.169 is frequently ordered alongside the 4656101056: TRANSMISSION HOUSING and the 4656201075: HOUS.FRONT SECT to complete a full transmission overhaul.
Symptoms of Failure
When the ZF 4656.056.169 wears beyond specification, operators will notice distinct performance degradation. The most common failure symptom is a persistent low-frequency whine or growl from the transmission housing, particularly under load in second or third gear. Another clear indicator is intermittent gear slipping during upshifts, as the clearance loss prevents proper clutch pack engagement. Technicians often report metallic debris in the transmission oil filter during routine service, which directly points to this thrust washer breaking down. Finally, a sudden loss of forward drive without warning lights can occur if the part fractures completely, requiring immediate disassembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4656.056.169 |
| Material | Case-hardened steel (20MnCr5 equivalent) |
| Outer Diameter | 98.5 mm |
| Inner Diameter | 72.0 mm |
| Thickness | 4.2 mm |
| Weight | 0.18 kg |
| Surface Hardness | 58-62 HRC |
| OEM Reference | ZF 4656.056.169 |
Compatibility
This genuine ZF part is primarily designed for the WG 160 Series transmission, which includes the WG160, WG160C, and WG160E variants. It is also compatible with the WG180 and WG200 series transmissions produced between 2008 and 2020, as these models share the same planetary gearset architecture. The part interfaces directly with the 4656201077: HOUSING REAR PART and the 4656298049: HOUSING REAR SECTION to form the complete rear support assembly. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gearset |
| 4656201075 | HOUS.FRONT SECT | Front section of the transmission housing |
| 4656201077 | HOUSING REAR PART | Rear housing section for clutch support |
| 4656298049 | HOUSING REAR SECTION | Secondary rear housing component |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 4656301148 | FIXING PLATE | Secures thrust washer in position |
| 0636100817 | CAP SCREW | Fastener for housing sections |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Secondary oil strainer element |
| 0636100803 | CAP SCREW | Mounting bolt for rear housing |
Frequently Asked Questions
Q: Can I reuse the 4656.056.169 during a rebuild?
A: No. This is a wear-critical component. ZF recommends replacing it with a new OEM part during any transmission overhaul to guarantee proper clearance and prevent future failure.
Q: How do I know if my WG160 needs this part?
A: If you are replacing the 4656201077: HOUSING REAR PART or the 4656298049: HOUSING REAR SECTION, you must also install a new 4656.056.169 thrust washer, as the old one will have worn to match the previous housing geometry.
Q: What tools are required to install this part?
A: Standard transmission tools including a bearing press, snap ring pliers, and a torque wrench calibrated to ZF specifications are necessary. Always consult the factory service manual for exact procedures.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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