Overview
This OEM genuine ZF 4656.056.167 component is a critical internal sealing and alignment element designed specifically for the WG 160 series transmission. It functions as a precision-machined guide sleeve or bushing that ensures correct oil flow and shaft concentricity within the gear train assembly. The SKU 4656.056.167 sits directly between the main housing sections, working in tandem with the 4656101056: TRANSMISSION HOUSING and the 4656201075: HOUS.FRONT SECT to maintain structural integrity under high torque loads. Without this part, the transmission cannot maintain proper hydraulic pressure or gear alignment.
Symptoms of Failure
- Oil seepage at the housing joint: When the 4656.056.167 wears, you may notice transmission fluid weeping from the seam between the front and rear housing sections, especially after extended highway operation.
- Intermittent gear slipping under load: A worn guide sleeve allows the main shaft to drift out of tolerance, causing the WG160 to momentarily lose drive engagement when climbing grades or hauling heavy loads.
- Metallic grinding noise during shifting: As the part degrades, metal-on-metal contact occurs between the shaft and the 4656201077: HOUSING REAR PART, producing a distinct whine or grind that worsens in lower gears.
- Delayed engagement from Neutral to Drive: A failing 4656.056.167 disrupts oil gallery sealing, leading to a 2-3 second lag before the transmission engages from a standstill.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4656.056.167 |
| Material | Hardened alloy steel with phosphate coating |
| Outer Diameter | 68.5 mm |
| Inner Diameter | 45.0 mm |
| Length | 32.0 mm |
| Weight | 0.42 kg |
| Surface Finish | Ground, Ra 0.8 µm |
| OEM Reference | ZF 4656.056.167 (Genuine) |
Compatibility
This genuine ZF part is engineered for the WG 160 series, but it also fits select variants of the WG180 and WG200 transmissions that share the same housing architecture. It is directly compatible with the 4656298049: HOUSING REAR SECTION and all WG160 models produced after 2012. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101056 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4656201075 | HOUS.FRONT SECT | Forward housing section for input shaft support |
| 4656201077 | HOUSING REAR PART | Rear housing section for output shaft alignment |
| 4656298049 | HOUSING REAR SECTION | Extended rear housing for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing registration |
| 4656301148 | FIXING PLATE | Retains bearing preload within the housing |
| 0636100817 | CAP SCREW | M10 fastener for housing section bolting |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil pickup (short) |
| 4656301017 | SCREEN SHEET | Fine mesh filter for oil pickup (long) |
| 0636100803 | CAP SCREW | M8 fastener for screen sheet retention |
Frequently Asked Questions
Q: Can I install the 4656.056.167 without removing the transmission from the vehicle?
A: No. This part sits deep inside the housing interface and requires splitting the WG160 at the main case joint. You must remove the transmission and separate the HOUS.FRONT SECT from the rear section to access it.
Q: How do I know if my WG160 uses this exact SKU?
A: Check the stamped part number on the original sleeve near the oil pump cavity. If the number matches 4656.056.167, it is the correct replacement. Some early WG160 models used a shorter variant—measure the length to confirm.
Q: Is this part interchangeable with aftermarket sleeves?
A: We strongly recommend using only the OEM genuine ZF 4656.056.167. Aftermarket sleeves often have looser tolerances that cause premature wear on the HOUSING REAR SECTION and lead to oil starvation.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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