Overview
The ZF 4642.107.402 SPEEDOMETER is a critical electromechanical component engineered specifically for the WG 200 Series powershift transmission. This OEM genuine part converts the rotational speed of the transmission output shaft into an electrical signal, which is then transmitted to the operator’s dashboard display. By providing real-time vehicle speed data, this speedometer ensures precise gear shift timing and load management within the drivetrain. The SKU 4642.107.402 is a direct replacement unit, manufactured to ZF’s original tolerances for reliable signal accuracy in heavy-duty construction and agricultural machinery.
Symptoms of Failure
- Erratic or fluctuating speed readings: A worn speedometer often causes the dashboard needle to jump or drop unexpectedly, making it difficult for operators to maintain consistent ground speed during grading or hauling operations.
- Complete loss of speed display: When the internal Hall-effect sensor fails, the gauge may read zero even though the vehicle is moving, leading to incorrect shift patterns and potential transmission damage.
- Intermittent warning lights: A failing 4642.107.402 unit can trigger false diagnostic trouble codes (DTCs) related to transmission output speed, causing unnecessary downtime and troubleshooting.
- Oil contamination inside the connector: Degraded seals allow transmission fluid to wick into the electrical connector, causing corrosion and short circuits that disrupt signal integrity.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.107.402 |
| OEM Reference | ZF WG200 Series |
| Material | Die-cast aluminum housing with stainless steel sensor tip |
| Weight | 0.35 kg (0.77 lbs) |
| Dimensions (L x W x H) | 85 mm x 28 mm x 28 mm |
| Output Signal Type | Digital square wave (Hall-effect) |
| Operating Voltage | 12–24 V DC |
| Sealing Class | IP67 with integrated O-ring |
Compatibility
This speedometer is designed for the ZF WG 200 Series transmission family, including models such as the WG180, WG200, and WG211. It is also backward-compatible with certain WG150 variants that use the same output flange interface. Always verify the mounting flange pattern and electrical connector type against your existing unit before installation. For full assembly integrity, this part is typically installed alongside the 4644101178 TRANSMISSION HOUSING or the 4644301223 TRANSMISSION HOUSING, which provide the sealed cavity for the sensor. The 0730365067 TYPE PLATE should be affixed to the housing for proper identification, while the 0631311009 GROOVED STUD secures the assembly to the transmission case.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101178 | TRANSMISSION HOUSING | Main structural casing for sensor mounting |
| 4644301223 | TRANSMISSION HOUSING | Alternate housing variant for WG200 |
| 0730365067 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastener for housing attachment |
| 4644303060 | COVER PLATE | Seals the sensor access port |
| 4644303061 | COVER PLATE | Alternate cover plate for different housing |
| 0634306525 | O-RING | Seals the speedometer to the housing |
| 0636305026 | SCREW PLUG | Closes unused sensor ports |
| 0501316470 | BREATHER | Equalizes internal pressure |
| 4644301279 | SCREEN SHEET | Filters debris from sensor area |
