Overview
The ZF 4660.107.001 SPEEDOMETER is a precision-engineered OEM component specifically designed for the WG 92 Series transmission family. This genuine part serves as the primary interface for monitoring output shaft rotational velocity, converting mechanical motion into an electrical signal that drives the vehicle’s speedometer and supports transmission control unit (TCU) data. Positioned directly on the transmission housing, the SKU 4660.107.001 ensures accurate speed readings for both operator display and shift timing logic. When paired with a robust 4660101007: TRANSMISSION HOUSING, this speedometer maintains signal integrity under high-vibration conditions common in heavy-duty industrial applications.
Symptoms of Failure
- Erratic or fluctuating speedometer needle: A failing 4660.107.001 often produces intermittent signal dropout, causing the gauge to bounce or drop to zero without warning.
- Transmission shift hesitation or harsh engagement: When the speed sensor signal degrades, the TCU loses critical input, leading to delayed upshifts or abrupt downshifts during load changes.
- “Check Engine” or transmission warning lamp illumination: The onboard diagnostics detect missing or implausible speed data from the speedometer, triggering fault codes related to output speed sensor circuits.
- Complete loss of speed display: Total failure of the internal Hall-effect sensor or gear mechanism results in a permanently dead speedometer, often accompanied by a locked transmission in limp-home mode.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4660.107.001 |
| OEM Reference | ZF 4660.107.001 |
| Material | Die-cast aluminum housing with brass sensor tip |
| Weight | 0.35 kg (0.77 lbs) |
| Overall Length | 82 mm |
| Mounting Thread | M18 x 1.5 |
| Output Signal Type | Hall-effect, square wave (0–5V) |
| Operating Temperature Range | -40°C to +125°C |
| Sealing | Integrated O-ring (use 0634100317: O-RING for replacement) |
Compatibility
This speedometer is engineered for the ZF WG 92 Series, but its mounting pattern and signal characteristics also suit several other ZF transmissions that share the same output housing design. Compatible models include the WG180, WG200, WG210, and WG250 series. It integrates directly with the 4660301017: HOUSING assembly and is secured using a 0631306174: CYLINDRICAL PIN for precise alignment. Always verify the 0769123894: TYPE PLATE on your transmission to confirm the exact series designation before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101007 | TRANSMISSION HOUSING | Main structural casing for gear train and shafts |
| 4660301017 | HOUSING | Rear housing section supporting output components |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for precise housing mating |
| 0769123894 | TYPE PLATE | Identification plate with transmission model and serial |
| 4660221012 | SUCTION TUBE | Oil pickup tube for lubrication circuit |
| 0634100317 | O-RING | Sealing ring for speedometer mounting bore |
| 0636103273 | CAP SCREW | Fastener for housing and cover retention |
| 0750100022 | SCREW PLUG | Threaded plug for oil drain or test ports |
| 4660101804 | TRANSMISSION HOUSING | Alternate housing variant for specific WG models |
| 4660301008 | HOUSING | Alternate rear housing for extended gear sets |
