Overview
This OEM genuine ZF 4657.354.044 OUTPUT GEAR is a critical component designed for the WG171, WG190, WG191, and WG210 series transmissions. Positioned at the rear of the main shaft assembly, this gear transfers rotational force from the planetary gear set to the output flange, directly influencing vehicle speed and torque delivery. The part number 4657.354.044 is engineered to ZF’s exacting tolerances, ensuring precise meshing with the countershaft and differential. It works in concert with the 4656101030: TRANSMISSION HOUSING to maintain proper alignment and load distribution within the drivetrain.
Symptoms of Failure
- Whining or grinding noise during acceleration: Worn gear teeth produce a high-pitched whine, especially under load, indicating the 4657.354.044 has lost its surface hardening.
- Oil leaks near the output shaft seal: Excessive play in the output gear can damage the seal, causing transmission fluid to drip from the rear housing.
- Delayed engagement or gear slipping: When the output gear’s splines wear, power transfer becomes intermittent, leading to hesitation when shifting from neutral to drive.
- Vibration at highway speeds: A worn output gear creates imbalance in the driveline, felt as a rhythmic shudder through the chassis.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4657.354.044 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Number of Teeth | 37 (estimated) |
| Outer Diameter | 185 mm |
| Inner Spline Diameter | 45 mm |
| Weight | 3.2 kg |
| OEM Reference | ZF 4657.354.044 |
| Surface Hardness | 58–62 HRC |
Compatibility
This output gear is engineered for ZF’s WG-series powershift transmissions. It is a direct fit for the WG171, WG190, WG191, and WG210 models. Additionally, it is compatible with the WG180 and WG200 series when used with the correct 4656301066: HOUS.FRONT SECT and 4656201015: SCREEN SHEET. Always verify the spline count and shaft diameter against your transmission’s service manual before installation. The gear also interfaces with the 4656301037: TUBE for lubrication flow.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Encloses and supports the gear train |
| 4656301066 | HOUS.FRONT SECT | Front section of the transmission case |
| 4656201015 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4656301037 | TUBE | Routes oil to bearings and gears |
| 0634313514 | O-RING | Seals fluid passages |
| 0636100803 | CAP SCREW | Fastens housing sections |
| 4656301064 | HOUSING REAR PART | Rear section of the transmission case |
| 0631306816 | CYLINDRICAL PIN | Aligns housing halves |
| 0636100801 | CAP SCREW | Secures output flange |
| 0636100160 | CAP SCREW | Mounts the rear housing |
Frequently Asked Questions
Q: Can the 4657.354.044 output gear be used in a WG180 transmission?
A: Yes, it is compatible with the WG180 series, provided the transmission uses the same 37-tooth output configuration. Always cross-reference your existing gear’s tooth count and spline dimensions.
Q: What causes premature wear on this output gear?
A: Contaminated transmission fluid, low oil levels, or a misaligned 4656301066: HOUS.FRONT SECT can accelerate tooth wear. Regular fluid changes and proper torque on all cap screws help extend service life.
Q: Do I need to replace the O-ring and cap screws when installing this gear?
A: Yes, ZF recommends replacing the 0634313514: O-RING and 0636100803: CAP SCREW during any output gear replacement to prevent leaks and ensure proper clamping force.
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ZF 4657.354.044 OUTPUT GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4657.354.044 OUTPUT GEAR with fast RFQ support, expert part-number lookup, documentation review, and export coordination. This gear page is built from confirmed catalog, media, and reference data to reduce sourcing uncertainty for construction machinery transmission parts.
Part-Number Summary
Use ZF number 4657.354.044 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4656073032
- Documentation reference: 4656073058
- Documentation reference: 4657033001
- Documentation reference: 4657054027
- Illustration section: POWER TAKE OFF
Cross Reference Support
If you have an OEM number, old supplier number, or visible marking, include it with your RFQ so PartsZF can compare it with the available records.
Specification Snapshot
| ZF part number | 4657.354.044 |
|---|---|
| Normalized SKU | 4657354044 |
| Part name | OUTPUT GEAR |
| Product category | gear |
| Cross-reference support | Available for RFQ review |
Image and Documentation Notes
Current product media status: fallback. Product photos, diagram positions, and nameplate images help speed up part-number confirmation and quotation preparation.
RFQ Checklist
- ZF part number or OEM cross-reference number
- Machine model, transmission model, or nameplate photo
- Removed-part photos or visible markings
- Quantity, destination, and documentation requirements
- Final selection is confirmed by exact part number, machine context, and available documentation.
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- ZF 4644.252.019 SPUR GEAR
