Overview
The ZF 4657.354.042 INPUT GEAR is a critical drivetrain component engineered for the WG171, WG190, and WG191 transmission series. This OEM genuine part transfers rotational force from the torque converter directly into the planetary gearset, making it the primary power input point within the assembly. Machined from case-hardened alloy steel, the 4657.354.042 input gear interfaces precisely with the 4656101030: TRANSMISSION HOUSING to maintain correct shaft alignment and load distribution. Without this gear functioning properly, the entire transmission loses its ability to modulate torque effectively, leading to immediate operational degradation.
Symptoms of Failure
- Whining or howling noise during acceleration: Worn input gear teeth create a high-pitched metallic sound, especially noticeable when the transmission is under load. This “ZF input gear whine” is a common search query for technicians diagnosing drivetrain issues.
- Delayed engagement or gear slipping: As the input gear’s splines wear, the connection to the clutch pack becomes loose, causing a momentary loss of power transfer before the transmission “catches.”
- Metal particles in transmission fluid: Flaking or spalling on the gear surface deposits fine metallic debris into the oil pan. This often accompanies failure of the 4656201015: SCREEN SHEET, which can become clogged with these fragments.
- Vibration at specific RPM ranges: An unbalanced or chipped input gear causes harmonic vibration that resonates through the 4656301066: HOUS.FRONT SECT, often felt in the vehicle chassis during highway cruising.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4657.354.042 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 2.85 kg (6.28 lbs) |
| Outside Diameter | 142 mm |
| Spline Count | 24 internal / 36 external |
| Heat Treatment | Carburized & quenched to HRC 58-62 |
| OEM Reference | ZF 4657.354.042 |
Compatibility
This input gear is designed for ZF’s WG-series powershift transmissions used in off-highway and industrial equipment. Confirmed compatibility includes the WG171, WG190, WG191, WG210, and WG211 series. It also fits the BP 210 series. The gear interfaces directly with the 4656301037: TUBE for lubrication flow and requires proper shimming against the housing rear section. For WG180 or WG200 variants, verify the spline count matches your existing assembly before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101030 | TRANSMISSION HOUSING | Encloses and supports the gear train |
| 4656301066 | HOUS.FRONT SECT | Front section housing for input shaft bearings |
| 4656201015 | SCREEN SHEET | Fine mesh filter protecting the hydraulic circuit |
| 4656301037 | TUBE | Lubrication oil delivery tube |
| 0634313514 | O-RING | Seals housing joints against fluid leaks |
| 0636100803 | CAP SCREW | M10 fastener for housing attachment |
| 4656301064 | HOUSING REAR PART | Rear section housing for output shaft support |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing positioning |
| 0636100801 | CAP SCREW | M12 fastener for gear retention |
| 0636100160 | CAP SCREW | M8 fastener for cover plate mounting |
Frequently Asked Questions
Q: Can the 4657.354.042 input gear be reused if it shows minor wear?
A: No. ZF recommends immediate replacement of any input gear showing pitting, scoring, or discoloration. Reusing a worn gear accelerates damage to the mating clutch hub and the HOUS.FRONT SECT.
Q: Does this part include the necessary O-rings or seals?
A: The gear itself is sold as a standalone component. You will need to order the 0634313514: O-RING separately for the housing interface seal.
Q: How do I verify this gear fits my WG191 transmission?
A: Check the serial number plate on your transmission. The WG191 uses a 36-tooth external spline on the input gear. If your unit has a 32-tooth spline, you require a different part number.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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ZF 4657.354.042 INPUT GEAR – Gear RFQ Support
PartsZF helps B2B buyers source ZF 4657.354.042 INPUT 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 4657.354.042 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Documentation reference: 4656073002
- Documentation reference: 4656073027
- Documentation reference: 4656073029
- Documentation reference: 4656073032
- Illustration section: POWER TAKE OFF
- Illustration section: LOOSE PARTS
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 | 4657.354.042 |
|---|---|
| Normalized SKU | 4657354042 |
| Part name | INPUT 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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