Overview
The ZF 4642.302.177 INPUT GEAR is a critical power-transfer component engineered specifically for the WG 150 series transmission. This OEM genuine part serves as the primary interface between the engine’s output shaft and the transmission’s planetary gear set, converting rotational force into controlled torque for heavy-duty industrial applications. Positioned at the front of the gear train, the 4642.302.177 input gear engages directly with the TRANSMISSION HOUSING (4642101109) to ensure precise alignment and minimal backlash. Manufactured to ZF’s exacting tolerances, this SKU 4642.302.177 component is forged from case-hardened alloy steel to withstand continuous high-load cycles in construction, mining, and agricultural machinery.
Symptoms of Failure
- Whining or grinding noise during gear engagement — Worn input gear teeth create audible metallic sounds, especially under load, indicating surface fatigue or pitting.
- Transmission slipping or delayed engagement — A damaged 4642.302.177 gear fails to maintain proper mesh, causing intermittent power loss or hesitation when shifting from neutral to drive.
- Metallic debris in transmission fluid — Flaking or chipped gear teeth contaminate the oil, often visible during routine fluid changes or when inspecting the TRANSMISSION HOUSING (4642301205) for sediment.
- Vibration through the drivetrain — Uneven wear on the input gear’s splines or bearing surfaces produces low-frequency shuddering that intensifies at higher RPMs.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.302.177 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Outside Diameter | Approx. 120 mm |
| Spline Count | 14-tooth internal spline |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4642.302.177 |
| Heat Treatment | Carburized & quenched to HRC 58-62 |
Compatibility
This input gear is designed for the ZF WG 150 series transmission, but it also fits select models in the WG 180 and WG 200 families due to shared gear train architecture. It is directly compatible with transmissions using the TYPE PLATE (0730365125) for identification and the GROOVED STUD (0631311009) for housing retention. Always verify your transmission’s serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Encloses gear train and supports input shaft alignment |
| 4642301205 | TRANSMISSION HOUSING | Alternate housing variant for WG150 series |
| 0730365125 | TYPE PLATE | Identification plate for transmission model verification |
| 0631311009 | GROOVED STUD | Fastener for securing housing components |
| 4642301168 | SCREEN SHEET | Oil filtration mesh for debris protection |
| 4642301169 | SCREEN SHEET | Secondary oil screen for high-flow circuits |
| 0636100621 | HEXAGON SCREW | M10 bolt for gear and housing fastening |
| 4642301186 | SCREEN SHEET | Fine-mesh screen for hydraulic circuit protection |
| 4644106085 | SHIFT SYSTEM | Hydraulic valve assembly for gear selection |
| 4642306050 | COVER PLATE | Sealing plate for transmission access port |
ZF 4642.302.177 INPUT GEAR – Gear RFQ Support
ZF 4642.302.177 INPUT GEAR is handled as a gear-train sourcing item for transmission repair teams. PartsZF can review the part number and documentation before quotation.
Part-Number Summary
Use ZF number 4642.302.177 when sending your RFQ. PartsZF can review dotted, spaced, and compact number formats against the available product and documentation records.
Application Context
- Illustration section: INPUT
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 | 4642.302.177 |
|---|---|
| Normalized SKU | 4642302177 |
| Part name | INPUT GEAR |
| Product category | gear |
| RFQ support | Part-number lookup and documentation review |
| Media support | Product photo or diagram review when available |
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.
Related Parts
- ZF 4661.302.010 GEAR
- ZF 2094.306.024 GEAR SHIFT RAIL
- ZF 4642.353.026 SPUR GEAR
- ZF 4143.142.013 GEAR SHIFT SENSOR
- ZF 4143.142.022 GEAR SHIFT SENSOR
