Overview
The ZF 1229.302.104 FLANGED DISC is a critical OEM genuine component engineered specifically for the WG 65 Series transmission. This precision-machined disc functions as a load-bearing interface within the clutch pack assembly, ensuring smooth torque transfer and consistent hydraulic pressure distribution. Positioned between the steel reaction plates and friction discs, the flanged disc (SKU: 1229.302.104) prevents metal-to-metal contact and maintains proper clearance during gear shifts. Its flanged design provides additional axial stability, reducing vibration and extending the service life of the entire clutch system. When replacing this part, it is common to also inspect the 4616105413: OUTPUT and the 4616203017: OUTPUT FLANGE for wear, as these components work in tandem to transmit rotational force.
Symptoms of Failure
When the ZF 1229.302.104 flanged disc degrades, operators may notice these specific failure indicators:
- Delayed or harsh shifting: A worn flanged disc causes erratic clutch engagement, leading to noticeable lurching or hesitation between gears, especially under load.
- Transmission oil contamination: As the disc surface wears, metallic particles shed into the hydraulic fluid, often visible as dark, gritty residue on the dipstick or during oil changes.
- Intermittent loss of drive: The disc’s reduced thickness allows clutch pack slippage, resulting in temporary power loss when climbing grades or accelerating from a stop.
- Audible grinding or whining: A failing disc creates abnormal noise from the transmission housing, particularly in neutral or low-gear operation, indicating improper clearance.
Technical Specifications
| Specification | Detail |
|---|---|
| Part Number | 1229.302.104 |
| Type | Flanged Disc (Clutch Plate) |
| Material | Hardened Steel with Anti-Corrosion Coating |
| Outer Diameter | Approx. 180 mm |
| Inner Diameter | Approx. 120 mm |
| Thickness | 3.5 mm (nominal) |
| Weight | 0.45 kg |
| OEM Reference | ZF 1229.302.104 |
| Compatible Fasteners | 0636011038: HEXAGON SCREW, 0636016015: HEXAGON SCREW |
| Sealing Components | 0634313118: O-RING, 0634303718: O-RING |
| Alignment Aid | 0631306085: CYLINDRICAL PIN |
| Filtration | 0732611049: FILTER INSERT |
| Mounting Hardware | 0636610082: STUD |
Compatibility
This flanged disc is primarily designed for the ZF WG 65 Series transmission, but it also fits select models within the broader WG family. Based on its clutch pack configuration, the 1229.302.104 is compatible with the following ZF transmissions: WG65, WG80, WG120, WG180, and WG200. Always verify the clutch stack height and spline count before installation. For complete transmission rebuilds, ensure the 4616101117: TRANSMISSION HOUSING is free of cracks or warpage, and replace all 0636011038: HEXAGON SCREW fasteners to maintain torque specifications.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616105413 | OUTPUT | Transfers rotational force from transmission to driveline |
| 4616203017 | OUTPUT FLANGE | Connects output shaft to universal joint or yoke |
| 4616101117 | TRANSMISSION HOUSING | Encloses and protects internal gear and clutch assemblies |
| 0636011038 | HEXAGON SCREW | Secures housing and flange components |
| 0636016015 | HEXAGON SCREW | Fastens clutch pack retaining plates |
| 0631306085 | CYLINDRICAL PIN | Aligns clutch pack components during assembly |
| 0634313118 | O-RING | Seals hydraulic passages in clutch piston area |
| 0732611049 | FILTER INSERT | Traps debris from transmission fluid circulation |
| 0634303718 | O-RING | Prevents fluid leaks at output flange interface |
| 0636610082 | STUD | Provides threaded mounting points for bellhousing |
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