Overview
The ZF 4656.103.405 OUTPUT for WG160 is a critical driveline component engineered to transfer torque from the transmission’s planetary gearset to the output shaft and downstream drivetrain. Positioned at the rear of the gearbox housing, this OEM genuine part ensures precise rotational alignment and load distribution under heavy-duty operating conditions. The SKU 4656.103.405 is manufactured to ZF’s original tolerances, making it a direct replacement for worn units in the WG 160 Series. When paired with a robust TRANSMISSION HOUSING, this output component maintains structural integrity and prevents premature wear on adjacent bearings and seals.
Symptoms of Failure
- Oil seepage at the rear seal area: A worn 4656.103.405 output flange can distort the sealing surface, leading to gradual transmission fluid loss and low-pressure warnings.
- Vibration during gear engagement: When the output hub develops excessive clearance, operators often report a low-frequency shudder under load, especially in WG160-equipped vehicles.
- Intermittent gear slipping in higher ranges: A fatigued output component may fail to maintain consistent spline contact, causing momentary power loss during acceleration or hill climbs.
- Metallic debris in the oil pan: Spalling from a degraded output surface introduces ferrous particles into the lubrication circuit, accelerating wear on the HOUS.FRONT SECT and planetary assembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4656.103.405 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 4.2 kg (9.3 lbs) |
| Outer Diameter | 165 mm |
| Spline Count | 24 (internal) |
| OEM Reference | ZF 4656.103.405 |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This output component is primarily designed for the ZF WG 160 Series transmission. It is also mechanically interchangeable with select units in the WG 180 and WG 200 families, provided the rear housing configuration matches. For proper fitment, the output must be installed in conjunction with the HOUSING REAR PART (4656201036) or the alternative HOUSING REAR PART (4472239179), depending on the specific build year. Always verify spline engagement with the output shaft before final assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101031 | TRANSMISSION HOUSING | Main structural casing for gearset and shafts |
| 4656201075 | HOUS.FRONT SECT | Front section housing the torque converter |
| 4656201036 | HOUSING REAR PART | Rear housing supporting output assembly |
| 4472239179 | HOUSING REAR PART | Alternate rear housing variant for WG160 |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing dowel holes |
| 4656301148 | FIXING PLATE | Secures output flange to shaft |
| 0636100817 | CAP SCREW | Fastener for fixing plate retention |
| 4656301016 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4656301017 | SCREEN SHEET | Secondary filter screen for high-flow paths |
| 0636100803 | CAP SCREW | M10 bolt for housing flange connection |
Frequently Asked Questions
Q: How do I confirm the 4656.103.405 output fits my WG160 transmission?
Measure the output shaft spline diameter (24 internal splines at 165 mm OD) and verify the rear housing part number. If your unit uses the HOUSING REAR PART 4656201036, this output is a direct match.
Q: Can I reuse the old fixing plate and cap screws when installing this output?
ZF recommends replacing the FIXING PLATE and CAP SCREW (0636100817) with new hardware to ensure proper torque retention and avoid fastener fatigue.
Q: What causes premature wear on the 4656.103.405 output surface?
Contaminated transmission fluid with abrasive particles is the primary cause. Installing fresh SCREEN SHEET filters during service significantly extends output life.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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