Overview
The ZF 4656.103.433 OUTPUT for WG160/WG171 is a critical driveline component engineered to transfer rotational force from the transmission’s planetary gear set to the output shaft flange. Positioned at the rear of the gearbox housing, this OEM genuine part ensures precise torque delivery and axial alignment under heavy-duty loads. The SKU 4656.103.433 is machined from high-strength alloy steel to withstand continuous stress in commercial vehicles and off-highway equipment. When paired with the TRANSMISSION HOUSING, it forms the final power take-off point before the driveline.
Symptoms of Failure
- Oil seepage at the rear seal area – Worn splines or bearing surfaces on the 4656.103.433 can cause seal misalignment, leading to fluid loss and contamination of the clutch packs.
- Intermittent gear slipping under load – A fatigued output hub may allow the output shaft to oscillate, resulting in momentary loss of torque transfer during uphill climbs or heavy hauling.
- Metallic grinding noise from the tail housing – Excessive play between the output gear and the HOUS.FRONT SECT indicates advanced wear, often accompanied by debris in the transmission fluid.
- Vibration at highway speeds – A distorted output component can induce driveline shudder, especially when the HOUSING REAR PART is not properly aligned.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4656.103.433 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outer Diameter | 168 mm |
| Overall Length | 142 mm |
| Spline Count | 34 involute splines |
| Weight | 4.8 kg (10.6 lbs) |
| OEM Reference | ZF 4656.103.433 |
| Hardness | 58–62 HRC (case depth 0.8–1.2 mm) |
Compatibility
This output component is designed for ZF WG160 and WG171 series transmissions, commonly found in medium-duty trucks, fire apparatus, and industrial loaders. It also fits select WG180 and WG200 variants when used with the correct HOUSING REAR SECTION. Always verify the spline count and pilot bore dimensions before installation. The 4656.103.433 is not compatible with older WG150 or WG130 series without adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101057 | TRANSMISSION HOUSING | Main structural casing that supports the output assembly |
| 4656201075 | HOUS.FRONT SECT | Front section housing the input shaft and pump drive |
| 4656201078 | HOUSING REAR PART | Rear housing that encloses the output gear and bearing |
| 4656298050 | HOUSING REAR SECTION | Extended rear section for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing doweling |
| 4656301148 | FIXING PLATE | Retains output bearing in the housing bore |
| 0636100817 | CAP SCREW | M10 bolt for securing the fixing plate |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh pre-filter for sump pickup |
| 0636100803 | CAP SCREW | M8 bolt for screen sheet retention |
Frequently Asked Questions
Q: Can the 4656.103.433 output be reused after a transmission rebuild?
A: It is not recommended. The splines and bearing journal undergo work hardening during service. ZF advises replacing the output with a new OEM unit (SKU 4656.103.433) during any major overhaul to prevent premature failure.
Q: What torque specification should I use for the output shaft nut?
A: The retaining nut requires 450 Nm (332 ft-lbs) of torque with a new lock plate. Always consult the WG160/WG171 service manual for the exact tightening sequence.
Q: Does this part include the output flange or yoke?
A: No. The 4656.103.433 is the internal output hub only. The flange or yoke must be ordered separately based on your driveline configuration.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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