Overview
The ZF 0730.102.326 SHIM is a precision-engineered adjustment component designed exclusively for the WG 201 series transmission. This OEM genuine part serves as a critical spacer within the planetary gearset assembly, controlling axial clearance and ensuring correct preload between rotating and stationary elements. By maintaining exacting tolerances, the shim prevents metal-to-metal contact that can lead to premature wear. The SKU 0730.102.326 is factory-coded for direct replacement, eliminating guesswork during rebuilds or overhauls. When installed alongside the 4644101203: TRANSMISSION HOUSING or the 4644301382: TRANSMISSION HOUSING, this shim ensures the entire gear train operates within factory specifications.
Symptoms of Failure
- Excessive axial play in the output shaft: A worn or missing shim allows the shaft to move longitudinally, causing a clunking noise during acceleration or deceleration. This is a classic sign of “ZF transmission shim wear” that demands immediate attention.
- Intermittent gear slipping under load: When the shim loses thickness, clutch pack clearance increases, leading to delayed engagement and “WG201 transmission slipping” during hill climbs or heavy hauling.
- Low-frequency vibration at highway speeds: Incorrect shim stack height alters gear mesh patterns, producing a drone that worsens with RPM. This symptom often triggers searches for “ZF transmission vibration fix.”
- Metallic debris in transmission fluid: As the shim wears, it generates fine steel particles that contaminate the oil. This is a red flag for “transmission shim failure debris” and requires immediate disassembly.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 0730.102.326 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 62.0 mm |
| Inner Diameter | 48.5 mm |
| Thickness | 1.50 mm (nominal) |
| Weight | 18 grams |
| OEM Reference | ZF 0730.102.326 |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
Compatibility
This shim is engineered for the ZF WG 201 series, but its application extends to closely related models. It is a direct fit for the WG180, WG200, and WG210 transmissions, as well as the WG 201 itself. The part is also used in some WG 202 variants where the planetary carrier stack height requires adjustment. Always verify the existing shim thickness before ordering; the 0730.102.326 is a standard service thickness. For complete assembly, pair this shim with the 4644301189: THREADED BUSH and the 0636302005: SCREW PLUG to secure the housing cavity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101203 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301382 | TRANSMISSION HOUSING | Alternative housing variant for WG201 |
| 4644301189 | THREADED BUSH | Provides wear-resistant thread for housing bolts |
| 0636302005 | SCREW PLUG | Seals oil passages in housing |
| 0634306198 | O-RING | Prevents fluid leaks at joints |
| 0634801098 | SEALING RING | Static seal for cover plates |
| 0730365067 | TYPE PLATE | Identification tag for transmission model |
| 0631311009 | GROOVED STUD | Locating pin for housing alignment |
| 4644301161 | COVER PLATE | Encloses the shim and gear assembly |
| 0636100621 | HEXAGON SCREW | Fastener for cover plate retention |
