Overview
The ZF 4616.107.012 SPEEDOMETER is a precision-engineered OEM genuine component specifically designed for the WG 65 Series transmission family. This critical sensor assembly monitors output shaft rotational velocity, converting mechanical motion into an electrical signal that drives the vehicle’s speedometer and supports transmission control unit (TCU) logic for shift timing and torque converter lockup. Positioned directly on the transmission housing adjacent to the 4616105413: OUTPUT assembly, the SKU 4616.107.012 ensures accurate speed data transmission under extreme thermal and vibrational loads common in heavy-duty industrial applications.
Symptoms of Failure
- Erratic or intermittent speedometer readings – The gauge may jump, drop to zero, or display incorrect values, often caused by internal gear wear or magnet degradation within the 4616.107.012 unit.
- Transmission shift hunting or harsh engagement – A failing speedometer sensor sends inconsistent RPM data to the TCU, leading to delayed upshifts, premature downshifts, or harsh clutch engagement during acceleration.
- Oil seepage around the sensor mounting point – Deteriorated O-rings or housing cracks allow transmission fluid to leak past the speedometer bore, often visible as drips near the 4616203017: OUTPUT FLANGE interface.
- Check engine or transmission warning lights – Modern diagnostic systems log fault codes (e.g., P0500, P0722) when the speedometer signal is absent or out of range, directly traceable to a worn 4616.107.012 component.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4616.107.012 |
| OEM Reference | ZF 4616.107.012 |
| Material | Hardened steel gear with brass bushing; aluminum housing |
| Weight | 0.35 kg (0.77 lbs) |
| Overall Length | 85 mm |
| Mounting Thread | M18 x 1.5 |
| Output Signal Type | Hall-effect (digital square wave) |
| Operating Temperature Range | -40°C to +120°C (-40°F to +248°F) |
| Seal Type | Integrated O-ring (replacement: 0634313118: O-RING) |
Compatibility
This speedometer sensor is engineered for the ZF WG 65 Series, but its mounting pattern and signal output also suit several other ZF transmissions used in construction, mining, and agricultural equipment. Compatible models include the WG180, WG200, WG210, and WG250 series, as well as earlier WG 65 variants. Always verify the drive gear ratio and housing bore depth before installation. The sensor interfaces directly with the 4616101127: TRANSMISSION HOUSING and is secured using 0636011038: HEXAGON SCREW fasteners.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers rotational force from transmission to driveline |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to driveshaft yoke |
| 4616101127 | TRANSMISSION HOUSING | Main structural casing enclosing gear sets and shafts |
| 0636011038 | HEXAGON SCREW | Fastens speedometer sensor to housing |
| 0636016015 | HEXAGON SCREW | Secures output flange to output shaft |
| 0631306085 | CYLINDRICAL PIN | Aligns housing halves during assembly |
| 0634313118 | O-RING | Seals speedometer sensor bore against fluid leakage |
| 0732611049 | FILTER INSERT | Traps debris in transmission oil circuit |
| 0634303718 | O-RING | Seals output flange to housing interface |
| 0636610082 | STUD | Provides threaded mounting point for housing covers |
