Overview
The ZF 4642.107.001 SPEEDOMETER is a critical electromechanical component designed specifically for the WG 150 series transmission. This OEM genuine part monitors output shaft rotation and transmits precise speed data to the vehicle’s dashboard or electronic control unit. Positioned within the rear housing assembly, the speedometer gear interfaces directly with the transmission’s rotating components to ensure accurate velocity readings during operation. The SKU 4642.107.001 is manufactured to ZF’s exacting tolerances, guaranteeing seamless integration with your existing drivetrain. When paired with a properly sealed 4642101047: TRANSMISSION HOUSING or the 4642301207: TRANSMISSION HOUSING, this speedometer delivers reliable performance under heavy industrial loads.
Symptoms of Failure
- Erratic or fluctuating speedometer needle: A worn 4642.107.001 often causes the gauge to jump unpredictably, especially during deceleration or low-speed operation.
- Complete loss of speed signal: When the internal gear teeth strip or the magnetic sensor fails, the dashboard displays zero speed even while the vehicle is moving, triggering warning lights.
- Transmission shift hesitation: Since the control unit relies on speed data, a failing speedometer can cause delayed or harsh gear changes, mimicking a slipping transmission.
- Oil seepage around the mounting bore: Degraded seals on this part allow transmission fluid to leak past the housing, leaving visible drips under the chassis.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.107.001 |
| OEM Reference | ZF 4642.107.001 |
| Material | Hardened steel gear with brass bushing |
| Overall Length | 85 mm |
| Gear Diameter | 32 mm |
| Weight | 0.18 kg |
| Mounting Thread | M18 x 1.5 |
| Output Signal Type | Hall-effect pulse |
| Operating Temperature Range | -40°C to +120°C |
Compatibility
This speedometer is primarily engineered for the ZF WG 150 series, but it also fits select models in the WG 180 and WG 200 families due to shared housing designs. It is directly compatible with transmissions using the 0730365067: TYPE PLATE for identification. For proper installation, ensure the 0631311009: GROOVED STUD is torqued to factory specifications to prevent vibration-induced failure. The 4642.107.001 is not backward-compatible with older ZF 4HP or 5HP series without adapter kits.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Encloses gear train and supports speedometer mounting |
| 4642301207 | TRANSMISSION HOUSING | Alternate housing variant for WG150 series |
| 0730365067 | TYPE PLATE | Identification plate for transmission model verification |
| 0631311009 | GROOVED STUD | Secures speedometer assembly to housing |
| 4642301168 | SCREEN SHEET | Filters debris from lubrication oil |
| 4642301169 | SCREEN SHEET | Alternative filtration screen for WG150 |
| 0636100621 | HEXAGON SCREW | Fastener for housing and cover plates |
| 4642301186 | SCREEN SHEET | Fine-mesh screen for high-flow applications |
| 4644106300 | SHIFT SYSTEM | Controls gear engagement and modulation |
| 4644306500 | COVER PLATE | Seals the shift system compartment |
