Overview
The ZF 4616.203.002 DISC CARRIER is a critical internal component engineered for the WG 65 series of heavy-duty transmissions. This genuine OEM part serves as the central hub that houses and aligns the clutch disc packs, ensuring precise torque transfer and smooth gear engagement under high-load conditions. Positioned within the main gear train assembly, the disc carrier must maintain exacting tolerances to prevent slippage and drivetrain inefficiency. The SKU 4616.203.002 is factory-matched to ZF’s original specifications, making it a direct replacement for worn units in WG65 gearboxes. For complete assembly integrity, this carrier is mounted inside the 4616101059: TRANSMISSION HOUSING, and it is secured using precision fasteners such as the 0636011038: HEXAGON SCREW and the 0636011118: HEXAGON SCREW.
Symptoms of Failure
When the ZF 4616.203.002 disc carrier begins to wear, operators often notice intermittent gear slippage under load, particularly during uphill climbs or when towing heavy trailers. Another common indicator is metallic grinding noises from the transmission bell housing, caused by the carrier splines wearing against the clutch discs. You may also experience delayed or harsh shifting between forward gears, as the carrier loses its ability to maintain proper disc stack pressure. Finally, contaminated transmission fluid with visible metal particles is a strong sign that the carrier surface has degraded, requiring immediate replacement to avoid catastrophic damage to the 0636016015: HEXAGON SCREW and adjacent components.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4616.203.002 |
| Material | High-strength alloy steel (case-hardened) |
| Outer Diameter | 180 mm (estimated) |
| Inner Spline Diameter | 65 mm |
| Overall Height | 95 mm |
| Weight | 3.2 kg (7.1 lbs) |
| OEM Reference | ZF 4616.203.002 |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This disc carrier is specifically designed for the ZF WG 65 transmission series, but it also fits select models in the WG180 and WG200 families due to shared spline geometry and clutch pack dimensions. Compatible gearbox variants include the WG65-6, WG180-6, and WG200-8, all of which utilize the same carrier mounting pattern. Always verify your transmission’s serial number before ordering. For a full rebuild, consider pairing this carrier with the 0631306085: CYLINDRICAL PIN for alignment and the 0634313118: O-RING for sealing the hydraulic circuit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101059 | TRANSMISSION HOUSING | Encloses and supports all internal gear train components |
| 0636011038 | HEXAGON SCREW | Secures disc carrier to main shaft |
| 0636011118 | HEXAGON SCREW | Fastens carrier to clutch drum assembly |
| 0636016015 | HEXAGON SCREW | Mounts carrier to output flange |
| 0631306085 | CYLINDRICAL PIN | Ensures precise alignment between carrier and housing |
| 0634313118 | O-RING | Seals hydraulic pressure around carrier bore |
| 0636304019 | SCREW PLUG | Closes oil passages in carrier assembly |
| 0634801152 | SEALING RING | Prevents fluid leakage at carrier joint |
| 0732611049 | FILTER INSERT | Traps debris from worn carrier surfaces |
| 0634303718 | O-RING | Secondary seal for carrier oil gallery |
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