Overview
The ZF 4656.103.402 OUTPUT for WG160 is a critical driveline component engineered to transfer rotational force from the transmission’s planetary gearset to the output shaft and downstream drive components. As an OEM genuine part, this output assembly ensures precise alignment and torque distribution within the WG 160 Series. The SKU 4656.103.402 is designed to interface seamlessly with the TRANSMISSION HOUSING and the HOUS.FRONT SECT, forming a robust assembly that withstands high cyclic loads. Without this output component, the transmission cannot deliver power to the wheels, making it a non-negotiable element for operational uptime.
Symptoms of Failure
- Oil leaks near the rear seal area – A worn output can cause fluid to bypass the seal, leading to low transmission fluid levels and potential overheating.
- Gear slipping under load – When the output bearing or splines degrade, torque transfer becomes inconsistent, causing the transmission to slip during acceleration or hill climbs.
- Vibration or driveline shudder – Excessive play in the output assembly creates harmonic imbalances that are felt through the chassis, especially at highway speeds.
- Unusual whining or grinding noises – Metal-to-metal contact from a failing output component produces audible noise that intensifies with engine RPM.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4656.103.402 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 4.2 kg (9.26 lbs) |
| Overall Length | 215 mm |
| Spline Count | 24 (internal) / 30 (external) |
| OEM Reference | ZF 4656.103.402 |
| Torque Capacity | 1,600 Nm (peak) |
Compatibility
This output component is primarily designed for the ZF WG 160 Series transmissions. It is also compatible with the WG 180 and WG 200 models when used with the appropriate HOUSING REAR PART (4656201034) or the alternative HOUSING REAR PART (4472239177). Always verify the housing variant before installation, as the output shaft length and spline profile may differ between series. The 4656.103.402 is not backward-compatible with WG 120 or WG 140 units without major adapter modifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101032 | TRANSMISSION HOUSING | Main structural casing for gearset and shafts |
| 4656201075 | HOUS.FRONT SECT | Front section housing for input shaft and pump |
| 4656201034 | HOUSING REAR PART | Rear housing section supporting output bearing |
| 4472239177 | HOUSING REAR PART | Alternate rear housing for WG 180/200 variants |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-output alignment |
| 0636100817 | CAP SCREW | Fastener for output flange retention |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil return circuit |
| 4656301017 | SCREEN SHEET | Coarse mesh filter for sump protection |
| 0636100803 | CAP SCREW | Bolt for rear housing attachment |
| 4681301040 | OIL FEED.HOUSG. | Oil feed channel for output bearing lubrication |
Frequently Asked Questions
Q: Can I install the 4656.103.402 output without replacing the rear housing?
A: Yes, provided the existing HOUSING REAR PART is not worn or cracked. However, we recommend inspecting both the output and the housing mating surfaces simultaneously to prevent premature failure.
Q: What torque specification should I use for the output flange cap screws?
A: Use the CAP SCREW (0636100817) tightened to 85 Nm (62.7 lb-ft) in a cross-pattern sequence. Always apply thread locker to prevent loosening under vibration.
Q: How do I know if my WG 160 needs a new output assembly?
A: Check for axial play greater than 0.5 mm at the output flange. If you detect movement or see metal particles in the oil screen (SCREEN SHEET 4656301016), replace the output immediately.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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