Overview
The ZF 0501.326.779 END SHIM is a precision-engineered spacer component designed for the WG200 and WG92 transmission families. This OEM genuine part sits between the output shaft and the transmission housing, where it controls axial end-play and ensures correct gear mesh alignment. By maintaining precise clearance tolerances, the 0501.326.779 prevents excessive shaft movement that can lead to premature bearing wear. This shim is often selected during rebuilds alongside a 4660198001 PERIPHERALS kit and a 0501209818 RANGE SELECTOR to restore factory-spec performance.
Symptoms of Failure
- Oil leaks at the output shaft seal — A worn end shim allows lateral shaft movement, distorting the seal lip and causing transmission fluid to weep from the rear housing.
- Gear slipping under load — Excessive end-play from a collapsed shim reduces clutch pack engagement pressure, leading to intermittent slipping in forward or reverse gears.
- Metallic grinding noise during deceleration — When the shim loses thickness, the shaft contacts the 4660101011 TRANSMISSION HOUSING, producing a distinct grinding sound that worsens over time.
- Vibration in neutral at idle — Uncontrolled axial movement of the output shaft creates low-frequency vibration felt through the chassis, often misdiagnosed as a torque converter issue.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 0501.326.779 |
| Material | Case-hardened steel (DIN 1.3505) |
| Outer Diameter | 68.0 mm |
| Inner Diameter | 52.0 mm |
| Thickness | 1.50 mm (selective fit) |
| Weight | 0.035 kg |
| OEM Reference | ZF 0501.326.779 |
| Surface Finish | Ground, Ra ≤ 0.4 µm |
Compatibility
This end shim is engineered for ZF WG-series transmissions with modular housing designs. It is directly compatible with the WG180, WG200, WG92, and WG94 series. It also fits select WG98 variants when used with the correct 4660301018 HOUSING assembly. Always verify the shim thickness against factory service manual specifications during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Gasket and seal kit for output shaft area |
| 0501209818 | RANGE SELECTOR | Controls high/low range engagement |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4660301018 | HOUSING | Rear housing adapter for WG92/200 |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for housing doweling |
| 0769123894 | TYPE PLATE | Identification plate for transmission model |
| 4660221012 | SUCTION TUBE | Oil pickup tube for pump inlet |
| 0634100317 | O-RING | Seals suction tube to pump housing |
| 0636103273 | CAP SCREW | Fastener for housing cover |
| 0750100022 | SCREW PLUG | Drain/fill port plug with sealing washer |
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