Overview
The ZF 4642.302.107 INPUT GEAR is a critical power-transfer component engineered specifically for the WG 150 series transmission family. This OEM genuine part sits at the primary shaft interface, receiving rotational force directly from the engine clutch or torque converter and transmitting it into the planetary gear set. Precision-ground teeth ensure minimal backlash and quiet operation under heavy industrial loads. The SKU 4642.302.107 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn or damaged input gears in refuse trucks, construction vehicles, and municipal equipment. When paired with a robust TRANSMISSION HOUSING (4642101108) or the TRANSMISSION HOUSING (4642301208), this gear ensures reliable torque delivery and extended service intervals.
Symptoms of Failure
- Whining or grinding noise from the bell housing: Worn input gear teeth produce a distinct high-pitched whine during acceleration or deceleration, often mistaken for bearing noise.
- Hard shifting or gear slipping: As the input gear loses tooth profile integrity, the transmission may hesitate or slip when engaging forward or reverse gears, especially under load.
- Metal particles in transmission fluid: Flaking or pitting on the gear surface contaminates the hydraulic circuit, visible as glitter or sludge on the dipstick or during fluid changes.
- Vibration at the shift lever or chassis: Uneven wear on the input gear creates rotational imbalance, transmitting vibration through the driveline that worsens at higher RPMs.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4642.302.107 |
| Gear Type | Helical input gear, case-hardened |
| Material | Alloy steel (20MnCr5 equivalent), carburized |
| Tooth Count | 27 teeth (estimated) |
| Outside Diameter | ~145 mm |
| Bore Diameter | ~45 mm (spline fit) |
| Face Width | ~38 mm |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4642.302.107 |
| Hardness | 58–62 HRC |
Compatibility
This input gear is designed for the ZF WG 150 series, but its spline dimensions and tooth geometry also allow fitment in select adjacent models. Verified compatible transmissions include:
- ZF WG 150 – Primary application
- ZF WG 151 – Same input shaft interface
- ZF WG 180 – Requires verification of bell housing depth
- ZF WG 200 – Limited compatibility; consult ZF service manual
Always inspect the TYPE PLATE (0730365125) on your transmission to confirm the exact series variant. The GROOVED STUD (0631311009) must be torqued to specification when securing this gear to the input shaft.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses gear train; provides mounting points |
| 4642301208 | TRANSMISSION HOUSING | Alternate housing variant for WG150 |
| 0730365125 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Secures input gear to shaft |
| 4642301168 | SCREEN SHEET | Filters debris from hydraulic circuit |
| 4642301169 | SCREEN SHEET | Fine-mesh screen for oil sump |
| 0636100621 | HEXAGON SCREW | Fastens housing and cover plates |
| 0630361029 | SEALING CAP | Prevents fluid leaks from unused ports |
| 4642306254 | ADAPTER | Converts input flange for PTO mounting |
| 0634303340 | O-RING | Seals input gear bore against oil leakage |
ZF 4642.302.107 INPUT GEAR – Gear RFQ Support
Use ZF 4642.302.107 INPUT GEAR as the reference when requesting gear support. Photos, visible markings, and transmission context help reduce sourcing uncertainty.
Part-Number Summary
Use ZF number 4642.302.107 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 | 4642.302.107 |
|---|---|
| Normalized SKU | 4642302107 |
| 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
