Overview
The ZF 4657.103.445 OUTPUT for WG190 is a critical final-drive component engineered to transfer torque from the transmission’s planetary gearset to the driveline. Positioned at the rear of the main housing assembly, this OEM genuine part ensures precise rotational alignment and load distribution under high-stress industrial applications. The SKU 4657.103.445 is machined from forged alloy steel to withstand continuous heavy-duty cycles, and it interfaces directly with the HOUS.FRONT SECT and the HOUSING REAR PART to maintain structural integrity. When paired with the TRANSMISSION HOUSING, this output component forms the backbone of the WG190’s power delivery system.
Symptoms of Failure
- Oil seepage at the rear output seal: Worn splines or bearing surfaces on the 4657.103.445 can cause seal distortion, leading to visible fluid drips beneath the transmission bell housing.
- Intermittent gear slipping under load: A fatigued output shaft may lose concentricity, causing the clutch packs to momentarily disengage during torque spikes.
- Metallic grinding noise during deceleration: Excessive play between the output and the HOUSING REAR SECTION generates audible chatter that worsens over time.
- Vibration in the driveline at highway speeds: Imbalanced rotation from a worn output component transfers harmonic resonance through the entire powertrain.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.103.445 |
| Material | Forged alloy steel (SAE 8620 case-hardened) |
| Weight | 3.85 kg (8.5 lbs) |
| Overall Length | 245 mm |
| Spline Count | 28 involute splines |
| OEM Reference | ZF 4657.103.445 |
| Torque Capacity | 1,200 Nm (885 lb-ft) |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This genuine ZF output is engineered for the WG 190 Series, but its spline geometry and bearing journal dimensions also allow direct fitment into the WG180 and WG200 transmission families. It is commonly used in municipal trucks, refuse vehicles, and medium-duty construction equipment. Always verify the rear housing variant—units paired with the HOUSING REAR PART require the same output length as the 4657.103.445 to maintain proper end-play clearance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Encases the gear train and supports all rotating assemblies |
| 4657201166 | HOUS.FRONT SECT | Front section that aligns the input shaft and pump drive |
| 4657201168 | HOUSING REAR PART | Rear housing segment that seats the output bearing |
| 4657298101 | HOUSING REAR SECTION | Complete rear section with integrated seal bore |
| 0631306816 | CYLINDRICAL PIN | Locating pin for precise housing alignment |
| 0636100801 | CAP SCREW | M10 fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Retains the output shaft in its axial position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for the lubrication circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for the oil pump |
| 0636100803 | CAP SCREW | M12 bolt for heavy-duty housing joints |
Frequently Asked Questions
Q: Can the 4657.103.445 output be used in a WG180 transmission?
A: Yes, the spline count and shaft diameter are identical across the WG180, WG190, and WG200 series. However, you must verify that the HOUSING REAR PART matches the output length to avoid axial preload issues.
Q: What causes premature wear on this output component?
A: The most common root cause is a misaligned TRANSMISSION HOUSING that introduces radial runout. Contaminated oil with abrasive particles also accelerates spline fretting.
Q: Is the 4657.103.445 supplied with a seal or bearing?
A: No, this is a bare output shaft. You will need to order the FIXING PLATE and the appropriate cap screws separately to complete the installation.
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Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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