Overview
The ZF 4646.124.007 TEMPERATURE SENSOR is a precision-engineered OEM genuine component designed specifically for the WG 260, WG 261, WG 310, and WG 311 transmission series. This sensor monitors hydraulic fluid temperature within the transmission sump, providing critical data to the control unit for regulating shift timing, clutch pressure, and torque converter lockup. Positioned directly in the valve body or oil pan interface, the SKU 4646.124.007 ensures accurate thermal readings to prevent overheating and maintain optimal lubrication viscosity. When installing this sensor, always pair it with a new 0634316523: O-RING to guarantee a leak-free seal against the housing.
Symptoms of Failure
- Erratic or delayed gear engagement: A failing temperature sensor sends incorrect fluid temperature signals, causing the transmission control module to miscalculate shift points, leading to harsh or slipping shifts.
- Overheating without warning: If the sensor reads falsely low temperatures, the transmission may not engage cooling circuits, resulting in fluid degradation and potential thermal damage.
- Check engine or transmission warning light: Modern ZF systems log diagnostic trouble codes (e.g., P0711, P0712) when the sensor output is out of range, often accompanied by reduced power mode.
- Fluid leaks at the sensor mounting point: Cracks in the sensor housing or degraded O-rings allow ATF to weep, leaving puddles under the vehicle and lowering fluid levels.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4646.124.007 |
| Sensor Type | NTC Thermistor (Negative Temperature Coefficient) |
| Temperature Range | -40°C to +150°C (-40°F to +302°F) |
| Thread Size | M14 x 1.5 |
| Housing Material | Brass with nickel plating |
| Seal Material | Viton (FKM) O-ring |
| Weight | 0.045 kg (0.099 lbs) |
| OEM Reference | ZF 4646.124.007 |
| Connector | 2-pin AMP Junior Timer |
Compatibility
This temperature sensor is engineered for the ZF WG series powershift transmissions, specifically the WG 260, WG 261, WG 310, and WG 311 models. It is also backward-compatible with earlier WG 180 and WG 200 series when used with the correct adapter harness. For secure mounting, use the 0636115293: 螺栓 and 0736300232: 螺栓 fasteners to attach the sensor bracket. Additionally, the 4475280208: SCREW PLUG is required to seal unused ports when retrofitting this sensor into older housings.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636115293 | 螺栓 | Mounting bolt for sensor bracket |
| 0736300232 | 螺栓 | Secondary fastener for sensor housing |
| 4475280208 | SCREW PLUG | Seals unused sensor ports |
| 0634316523 | O-RING | Seals sensor-to-housing interface |
| 0630361026 | SEALING CAP | Protects sensor connector from debris |
| 0501214611 | 齿轮泵 | Hydraulic pump for clutch actuation |
| 0634313945 | O形圈 | Seal for pump-to-housing connection |
| 0501322534 | TEMPERATURE SENSOR | Alternate sensor variant for WG200 series |
| 0634313366 | O-RING | Secondary seal for valve body ports |
| 4646130044 | ENGINE CONNECTION | Adapter plate for engine-to-transmission mating |
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