Overview
The ZF 0501.340.897 THRUST WASHER is a critical wear component engineered specifically for the WG 94 series transmission. This OEM genuine part functions as a precision axial spacer, absorbing end-play forces between rotating assemblies within the gear train. Located between the planetary carrier and the output shaft, the 0501.340.897 washer maintains correct gear mesh depth and prevents metal-on-metal contact under heavy load conditions. As an authentic ZF component, it guarantees exact dimensional tolerances required for proper hydraulic pressure regulation and torque transfer in your WG94 drivetrain.
Symptoms of Failure
- Intermittent gear slipping under load – When the thrust washer wears beyond specification, axial clearance increases, causing the clutch packs to lose engagement pressure during acceleration or hill climbing.
- Metallic grinding noise from transmission housing – A worn 0501.340.897 allows the output shaft to contact the case, producing a distinct low-frequency grinding sound during deceleration or coasting.
- Low transmission oil pressure warnings – Excessive end-play from a degraded thrust washer disrupts the oil flow path to the valve body, triggering dashboard alerts and potential shift hesitation.
- Visible metal particles in transmission fluid – As the washer disintegrates, fine steel shavings contaminate the oil, often visible on the dipstick or during drain intervals.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.340.897 |
| Material | Case-hardened steel (DIN 1.3505 equivalent) |
| Inner Diameter | 42.0 mm |
| Outer Diameter | 68.0 mm |
| Thickness | 2.5 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 0501.340.897 |
| Surface Finish | Ground, 0.4 Ra |
Compatibility
This thrust washer is a direct fit for the ZF WG94 series, including models WG94, WG94-2, and WG94-3. It is also compatible with the WG180, WG200, and WG250 transmissions that share the same planetary carrier architecture. The 0501.340.897 interfaces directly with the 4661103010: OUTPUT and the 4661303004: OUTPUT SHAFT, while working in conjunction with the 4661201204: TAPER ROLLER BEARING and the 4661201206: TAPERED ROLLER BEARING to maintain precise axial positioning. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661103010 | OUTPUT | Transfers torque from planetary carrier to driveshaft |
| 4661303004 | OUTPUT SHAFT | Rotating shaft transmitting power to differential |
| 4661201204 | TAPER ROLLER BEARING | Supports radial and axial loads on output shaft |
| 4661201206 | TAPERED ROLLER BEARING | Secondary bearing for high-thrust applications |
| 4661372031 | SCREEN SHEET | Filters debris from transmission oil circuit |
| 4661103800 | OUTPUT | Alternate output flange for WG94 variants |
| 4642303059 | INPUT FLANGE | Connects transmission input to engine flywheel |
| 0750111307 | SHAFT SEAL | Prevents oil leakage at output shaft exit point |
| 0634306328 | O-RING | Seals hydraulic passages between housing sections |
| 4660303022 | WASHER | Flat spacer for clutch pack preload adjustment |
