Overview
The ZF 0501.337.902 SPEED SENSOR is a critical electronic component responsible for monitoring output shaft rotational velocity within the WG100, WG130, and WG131 transmission series. Positioned directly on the control unit housing, this OEM genuine part transmits real-time data to the transmission control module, enabling precise shift timing and torque converter lockup. The SKU 0501.337.902 ensures accurate signal generation for optimal drivetrain performance. When paired with a robust 5838109012: DIFFERENTIAL, this sensor guarantees seamless power distribution across heavy-duty applications.
Symptoms of Failure
- Erratic shifting or gear hunting: A failing speed sensor sends inconsistent voltage signals, causing the transmission to shift unpredictably between gears under load.
- No speedometer reading or erratic needle movement: When the sensor loses magnetic pickup, the dashboard displays zero or fluctuating speed data, often accompanied by a check-engine light.
- Harsh engagement or delayed upshifts: Worn internal windings produce weak pulses, forcing the control unit to default to limp-home mode with abrupt clutch applications.
- Transmission slipping in higher gears: Inaccurate RPM data from the 0501.337.902 prevents proper line pressure modulation, leading to clutch pack slippage during highway cruising.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0501.337.902 |
| Sensor Type | Variable Reluctance (Magnetic) |
| Housing Material | Zinc-Diecast Alloy with Nickel Plating |
| Overall Length | 68.5 mm |
| Thread Size | M14 x 1.5 |
| Weight | 0.045 kg |
| OEM Reference | ZF 0501.337.902 |
| Operating Temperature Range | -40°C to +150°C |
Compatibility
This speed sensor is engineered for ZF WG-series powershift transmissions, specifically the WG100, WG130, and WG131 models used in construction and agricultural machinery. It also fits select WG180 and WG200 variants where the control unit mounting flange matches the sensor bore. For complete drivetrain integrity, always inspect the 0750117075: TAPER ROLLER BEARING and 2093209023: DIFFERENTIAL during sensor replacement to prevent premature wear. The 5838300626: DIFFERENTIAL HOUSING must also be checked for cracks or debris that could contaminate the sensor tip.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109012 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2093209023 | DIFFERENTIAL | Secondary torque split unit for heavy loads |
| 5838300626 | DIFFERENTIAL HOUSING | Encloses differential gears and lubricant |
| 0631329088 | SPRING PIN | Secures shift fork alignment |
| 5838300811 | THRUST WASHER | Reduces friction between rotating gears |
| 5838300721 | AXLE BEVEL GEAR | Transfers power at 90-degree angles |
| 5838300633 | AXLE | Transmits rotational force to wheels |
| 5838300753 | THRUST WASHER | Controls end-play in differential assembly |
| 5838300818 | THRUST WASHER | Prevents gear face scoring under load |
Frequently Asked Questions
Q: Can a faulty 0501.337.902 cause transmission overheating?
A: Yes. When the speed sensor fails, the control unit cannot regulate lockup clutch engagement, causing excessive heat generation from continuous torque converter slippage.
Q: Is this sensor interchangeable between WG130 and WG180 transmissions?
A: The 0501.337.902 fits WG130 and WG131 natively, but WG180 models require verification of the control unit mounting depth. Always compare the sensor tip length before installation.
Q: How do I test this speed sensor before replacement?
A: Measure resistance across the sensor terminals—expected range is 200-800 ohms at 20°C. Also check for AC voltage output while rotating the output shaft; a healthy sensor produces at least 0.5V AC at low speed.
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