Overview
The ZF 4660.374.003 DISC CARRIER is a critical internal component engineered for the WG92 and WG98 transmission series. This genuine OEM part functions as the primary hub that supports and aligns the clutch disc packs within the planetary gearset. By maintaining precise spacing and rotational stability, the disc carrier ensures smooth torque transfer and prevents clutch pack misalignment during high-load operations. The SKU 4660.374.003 is specifically machined to OEM tolerances, making it a direct replacement for worn units in heavy-duty commercial vehicle transmissions.
Symptoms of Failure
When the ZF 4660.374.003 disc carrier wears out, operators often notice intermittent gear slipping under load, particularly during uphill climbs or when towing. A second common symptom is delayed or harsh engagement when shifting between forward gears, caused by the carrier no longer holding the clutch discs in proper alignment. Third, you may detect metallic grinding noises emanating from the transmission housing, indicating the carrier has developed stress fractures or surface wear. Finally, contaminated transmission fluid with metallic particles is a clear sign that the disc carrier is shedding material, requiring immediate replacement to avoid cascading damage to the TRANSMISSION HOUSING.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4660.374.003 |
| Material | High-strength alloy steel (heat-treated) |
| Outer Diameter | 185 mm (estimated) |
| Inner Diameter | 95 mm (estimated) |
| Thickness | 22 mm (estimated) |
| Weight | 1.8 kg (estimated) |
| OEM Reference | ZF 4660.374.003 |
| Surface Finish | Ground and phosphate-coated |
Compatibility
This disc carrier is engineered for the ZF WG92 and WG98 transmission families, which are commonly found in medium-duty trucks, buses, and construction equipment. Based on its design and spline pattern, the 4660.374.003 is also compatible with the ZF WG180, WG200, and WG210 models that share the same planetary gear architecture. Always verify the carrier’s fitment against your transmission’s serial number, as variations exist between early and late production units. For a complete rebuild, pair this carrier with a new HOUSING II and replace the CYLINDRICAL PIN that secures the assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | TRANSMISSION HOUSING | Encloses the gear train and supports all internal components |
| 4660301054 | HOUSING II | Secondary housing section for clutch pack and valve body |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for precise carrier-to-housing positioning |
| 0769123894 | TYPE PLATE | Identification plate with transmission model and serial number |
| 0750100022 | SCREW PLUG | Seals fluid passages and inspection ports |
| 4660221029 | SUCTION TUBE | Draws transmission fluid from the sump to the pump |
| 0634100317 | O-RING | Seals the suction tube connection |
| 0636103273 | CAP SCREW | Fastens the housing sections together |
| 0634306311 | O-RING | Seals the cap screw interface |
| 4660321029 | FIXING PLATE | Locks the disc carrier in position within the drum |
