Overview
The ZF 4642.107.017 SPEEDOMETER is a precision electromechanical component designed to monitor output shaft rotation within the WG 150 transmission series. This OEM genuine part transmits real-time vehicle speed data to the dashboard instrumentation, ensuring accurate readings for both operator control and transmission ECU logic. The SKU 4642.107.017 interfaces directly with the transmission housing assembly, where it is mounted adjacent to the output flange. Proper function of this speedometer is critical for shift timing modulation and cruise control engagement in heavy-duty industrial applications.
Symptoms of Failure
- Erratic or intermittent speedometer needle fluctuation – A failing 4642.107.017 often produces random needle jumps or complete dropouts, particularly during low-speed maneuvering or under heavy load.
- Transmission fails to upshift or downshift correctly – When the speed sensor signal degrades, the transmission control unit cannot determine vehicle speed, leading to delayed shifts or unexpected gear hunting.
- Oil seepage around the speedometer mounting bore – Worn internal seals allow transmission fluid to migrate past the housing interface, leaving visible drips on the 4642101047 TRANSMISSION HOUSING or the 4642301207 TRANSMISSION HOUSING.
- Dashboard speed reading stuck at zero – Complete electrical failure of the speedometer results in a permanent zero reading, often accompanied by a check-engine or transmission warning light.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.107.017 |
| OEM Reference | ZF 4642.107.017 |
| Material | Reinforced thermopolymer housing with brass sensor core |
| Weight | 0.18 kg (0.40 lbs) |
| Overall Length | 72 mm |
| Mounting Thread | M18 x 1.5 |
| Output Signal Type | Hall-effect pulse (square wave) |
| Operating Temperature Range | -40°C to +120°C |
| Seal Type | Integrated O-ring (Viton) |
Compatibility
This speedometer is primarily engineered for the ZF WG 150 series, but it also fits select variants of the WG 180, WG 200, and WG 250 transmissions when the output housing configuration matches. The 4642.107.017 replaces earlier mechanical cable-driven units in later electronic control systems. Always verify the mounting bore depth and connector pinout against your specific transmission model. For proper installation, ensure the 0730365067 TYPE PLATE is legible to confirm the exact transmission revision, and use the 0631311009 GROOVED STUD to secure the speedometer bracket if your assembly requires it.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4642301207 | TRANSMISSION HOUSING | Alternate housing variant for extended output configurations |
| 0730365067 | TYPE PLATE | Identification plate with transmission serial and model data |
| 0631311009 | GROOVED STUD | Fastener for speedometer bracket or sensor mounting |
| 4642301168 | SCREEN SHEET | Fine mesh filter for hydraulic circuit debris protection |
| 4642301169 | SCREEN SHEET | Alternate mesh filter for high-flow oil circuits |
| 0636100621 | HEXAGON SCREW | M10 bolt for housing flange or cover plate retention |
| 4642301186 | SCREEN SHEET | Fine filter for auxiliary oil pump intake |
| 4644106300 | SHIFT SYSTEM | Complete shift fork and actuator assembly |
| 4644306500 | COVER PLATE | Sealing plate for transmission side access port |
