Overview
This OEM genuine ZF 4656.183.220 is a critical internal component specifically engineered for the WG 160 Series transmission. It functions as a precision-machined guide or spacer element within the clutch pack or planetary gear assembly, ensuring correct axial clearance and load distribution during gear shifts. The part number 4656.183.220 is manufactured to ZF’s original tolerances, guaranteeing a direct fit and long service life. When installed alongside the 4656101037: TRANSMISSION HOUSING, it maintains the structural integrity of the rotating assembly.
Symptoms of Failure
- Delayed or harsh engagement: When the 4656.183.220 wears, clutch pack clearance increases, causing a noticeable lag or a jarring shift when moving from Neutral to Drive or Reverse.
- Metallic grinding noise from the bell housing: A worn guide surface can allow gear components to contact the 4656201075: HOUS.FRONT SECT, producing a distinct grinding sound during acceleration.
- Intermittent gear slipping under load: As the part loses its dimensional integrity, the transmission may momentarily lose torque transfer, especially when climbing grades or carrying heavy payloads.
- Contaminated transmission fluid with metallic particles: Abrasion of this steel component introduces fine metal shavings into the oil, which can be detected during routine fluid changes.
Technical Specifications
| Specification | Detail |
|---|---|
| OEM Part Number | 4656.183.220 |
| Material | Case-hardened alloy steel |
| Outer Diameter | 183 mm |
| Inner Diameter | 160 mm |
| Thickness | 4.2 mm |
| Weight | 0.34 kg |
| Surface Finish | Ground and phosphate-coated |
| OEM Reference | ZF 4656.183.220 |
Compatibility
This genuine ZF 4656.183.220 is designed primarily for the WG 160 Series transmission family. It is also compatible with the WG 180 and WG 200 models that share the same planetary gearset architecture. The part interfaces directly with the 4656201035: HOUSING REAR PART and the 4472239178: HOUSING REAR PART to form the complete rear support structure. Always verify your transmission model tag before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101037 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4656201035 | HOUSING REAR PART | Rear housing section for output bearing retention |
| 4472239178 | HOUSING REAR PART | Alternate rear housing variant for specific ratios |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 4656301148 | FIXING PLATE | Locks the guide component in position |
| 0636100817 | CAP SCREW | M10 fastener for securing the fixing plate |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit protection |
| 4656301017 | SCREEN SHEET | Alternate micron rating filter screen |
| 0636100803 | CAP SCREW | M8 fastener for housing attachment |
Frequently Asked Questions
Q: Can the 4656.183.220 be reused during a rebuild?
A: No. ZF specifies this as a one-time-use component due to its crush-fit design and surface hardening. Reuse can lead to premature failure of the clutch pack and damage to the HOUS.FRONT SECT.
Q: How do I confirm this part fits my WG 160 transmission?
A: Check the transmission data plate for the model code (e.g., WG160-5A). This part is also used in some WG180 units, but always measure the inner diameter of the housing bore to ensure 160 mm clearance.
Q: What torque specification is required for the cap screws securing this component?
A: Use 45 Nm for the CAP SCREW (0636100817) and 25 Nm for the CAP SCREW (0636100803). Always apply medium-strength thread locker.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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