Overview
The ZF 4661.376.001 INNER DISK CARRIER is a critical rotating assembly component engineered for the WG90 and WG94 series transmissions. This genuine OEM part serves as the structural hub that houses and aligns the friction and steel disk packs within the clutch or brake assembly. By precisely positioning these disks, the carrier ensures consistent torque transfer and smooth gear engagement under heavy-duty industrial loads. The SKU 4661.376.001 is manufactured to exact ZF tolerances, guaranteeing a direct fit and long service life when paired with the 4661101001: TRANSMISSION HOUSING and the 4661301007: HOUSING.
Symptoms of Failure
- Delayed or harsh shifting: A worn inner disk carrier allows excessive axial play, causing the disk packs to misalign. This results in noticeable hesitation or jarring engagement when the transmission shifts between gears.
- Torque loss under load: When the carrier splines or locating surfaces degrade, the disks cannot clamp properly. Operators may experience power loss or “slipping” sensations during acceleration, particularly in WG90 applications.
- Metallic debris in oil: Friction between a failing carrier and the disk pack generates fine metal particles. Routine oil analysis or filter inspections will reveal this contamination, often accompanied by a burnt clutch smell.
- Oil leakage near the clutch housing: A distorted carrier can compromise the sealing surface against the 0631306174: CYLINDRICAL PIN and the 4661301093: TUBE, leading to external fluid seepage around the bell housing.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.376.001 |
| Material | High-strength alloy steel (induction-hardened splines) |
| Outer Diameter | ~210 mm (estimated) |
| Inner Diameter | ~160 mm (estimated) |
| Overall Height | ~85 mm (estimated) |
| Weight | ~3.2 kg (7.0 lbs) |
| OEM Reference | ZF 4661.376.001 |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This inner disk carrier is specifically designed for the ZF WG90 and WG94 transmission series. Based on its spline count and disk stack height, it is also compatible with the following ZF models that share the same clutch pack architecture: WG180, WG200, WG210, and WG220. Always verify the disk count and snap ring groove position against your existing assembly. For proper installation, ensure the carrier is seated squarely against the 4661101001: TRANSMISSION HOUSING and aligned with the 0631306174: CYLINDRICAL PIN to prevent rotation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101001 | TRANSMISSION HOUSING | Encloses and supports all rotating assemblies |
| 4661301007 | HOUSING | Provides secondary structural support for clutch packs |
| 4661301093 | TUBE | Directs lubrication oil to the disk carrier |
| 0631306174 | CYLINDRICAL PIN | Prevents carrier rotation within the housing |
| 0769123894 | TYPE PLATE | Identifies transmission model and serial number |
| 0750100022 | SCREW PLUG | Seals oil passages in the housing |
| 0636302602 | SCREW PLUG | Magnetic drain plug for debris collection |
| 0634100633 | O-RING | Seals the carrier-to-housing interface |
| 4661301029 | NOZZLE | Sprays cooling oil onto the disk pack |
| 4661301027 | NOZZLE | Secondary oil spray nozzle for clutch lubrication |
