Overview
The ZF 4661.372.049 Inner Disk Carrier is a critical rotating component engineered specifically for the WG 94 series of heavy-duty transmissions. This OEM genuine part functions as the central hub that houses and aligns the clutch disk packs, ensuring precise torque transfer between gear sets. Positioned directly within the main shaft assembly, the carrier interfaces with the TRANSMISSION HOUSING and the HOUSING II to maintain concentricity under extreme loads. The SKU 4661.372.049 is manufactured to ZF’s original tolerances, guaranteeing a direct fit without modification.
Symptoms of Failure
- Erratic gear engagement or slipping: When the inner disk carrier splines wear, clutch packs lose alignment, causing delayed or rough shifting under load.
- Metallic grinding noise from transmission: A worn carrier allows disk packs to wobble, producing a distinct grinding sound during acceleration or deceleration.
- Transmission fluid contamination with metallic debris: Friction between the carrier and disks generates fine metal particles, visible in the oil pan or filter.
- Reduced torque capacity during hill climbs: A fatigued carrier cannot maintain proper clamping force, leading to power loss in demanding applications.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.372.049 |
| Material | High-strength alloy steel, induction-hardened |
| Outer Diameter | 185 mm (estimated) |
| Inner Diameter | 95 mm (estimated) |
| Thickness | 42 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| OEM Reference | ZF 4661.372.049 |
| Torque Capacity | Up to 2,500 Nm (estimated) |
Compatibility
This inner disk carrier is designed for the ZF WG 94 series, which includes the following transmission models: WG94, WG180, WG200, and WG250. It is also compatible with select off-highway and construction equipment variants that utilize the WG94 platform. For proper installation, ensure the TUBE and CYLINDRICAL PIN are inspected simultaneously, as these components work in concert to secure the carrier assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101018 | TRANSMISSION HOUSING | Encloses and supports the entire gear train |
| 4661301050 | HOUSING II | Secondary housing for clutch and valve assembly |
| 4661301093 | TUBE | Oil feed tube for clutch lubrication |
| 0631306174 | CYLINDRICAL PIN | Alignment pin for carrier positioning |
| 0769123894 | TYPE PLATE | Identification plate for transmission model |
| 0750100022 | SCREW PLUG | Seals oil passages in the housing |
| 0636302602 | SCREW PLUG | Drain or fill port plug |
| 0634100633 | O-RING | Seals between housing and cover |
| 4661301029 | NOZZLE | Directs oil to clutch packs |
| 4661301027 | NOZZLE | Secondary oil spray nozzle |
