Overview
The ZF 4660.376.004 Disc Carrier is a critical internal component engineered specifically for the WG92 and WG98 series transmissions. This genuine OEM part functions as the structural hub that houses and aligns the clutch disc packs, ensuring precise torque transfer and smooth gear engagement under heavy-duty loads. Positioned within the main shaft assembly, the disc carrier directly interfaces with the 4660101017: TRANSMISSION HOUSING and the 4660301054: HOUSING II to maintain concentricity and axial stability. The SKU 4660.376.004 is manufactured to ZF’s exacting tolerances, making it a direct replacement for worn units in commercial vehicle and off-highway applications.
Symptoms of Failure
- Erratic gear engagement or slipping: A worn disc carrier can cause misalignment of clutch packs, leading to delayed or incomplete gear shifts under load.
- Metallic grinding noises from the transmission: Excessive play in the carrier allows metal-on-metal contact between discs and the housing, producing audible chatter during operation.
- Oil contamination with metallic debris: As the carrier surface degrades, fine steel particles enter the hydraulic circuit, often detected during routine oil analysis.
- Overheating in the clutch area: Friction from a warped or cracked carrier generates localized heat, potentially triggering thermal warning codes on the ECU.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4660.376.004 |
| Material | High-strength alloy steel, induction-hardened |
| Outer Diameter | 180 mm (estimated) |
| Inner Diameter | 95 mm (estimated) |
| Overall Height | 65 mm (estimated) |
| Weight | 2.8 kg (6.2 lbs) |
| OEM Reference | ZF 4660.376.004 |
| Surface Finish | Ground and phosphate-coated |
Compatibility
This disc carrier is designed for use in ZF WG92 and WG98 series transmissions, which are commonly found in medium-duty trucks, buses, and construction equipment. Based on its physical dimensions and spline configuration, the 4660.376.004 also fits select WG180 and WG200 variants where the clutch pack diameter matches. Always verify fitment by cross-referencing the existing part with the 0769123894: TYPE PLATE affixed to your transmission housing. The carrier is secured in place using a 0631306174: CYLINDRICAL PIN to prevent rotational slippage.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | Transmission Housing | Main structural casing for gear and shaft assembly |
| 4660301054 | Housing II | Secondary housing covering clutch pack area |
| 0631306174 | Cylindrical Pin | Alignment dowel for disc carrier positioning |
| 0769123894 | Type Plate | Identification label with transmission serial and model |
| 0750100022 | Screw Plug | Seals oil passages in the valve body |
| 4660221029 | Suction Tube | Transports oil from sump to pump inlet |
| 0634100317 | O-Ring | Static seal between housing and cover plate |
| 0636103273 | Cap Screw | Fastener for securing housing sections |
| 0634306311 | O-Ring | Dynamic seal on the suction tube connection |
| 4660321029 | Fixing Plate | Retains the disc carrier in axial position |
