Overview
The ZF 4661.373.007 INNER DISK CARRIER is a precision-machined component designed 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 proper torque transfer and smooth gear engagement. Positioned within the main shaft assembly, the carrier interfaces directly with the TRANSMISSION HOUSING and the HOUSING II to maintain concentricity under high load conditions. The SKU 4661.373.007 is engineered to OEM tolerances, making it a direct replacement for worn units in ZF WG94 transmissions.
Symptoms of Failure
- Delayed or harsh gear engagement — A worn inner disk carrier can cause misalignment of clutch packs, leading to sluggish shifting or abrupt engagement during acceleration.
- Transmission oil leaks at the housing interface — Cracks or wear on the carrier’s mating surfaces allow ATF to escape, often pooling near the CYLINDRICAL PIN mounting points.
- Metallic debris in the oil pan — Friction between a failing carrier and the disk splines generates fine metal particles, detectable during routine fluid changes.
- Vibration or whining noise in neutral — Excessive play in the carrier causes the TUBE assembly to resonate, producing audible noise even when the transmission is not under load.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4661.373.007 |
| Material | High-strength alloy steel, heat-treated |
| Outer Diameter | 185 mm (estimated) |
| Inner Diameter | 95 mm (estimated) |
| Height | 62 mm (estimated) |
| Weight | 2.8 kg (estimated) |
| OEM Reference | ZF 4661.373.007 |
| Surface Finish | Ground and phosphate-coated |
Compatibility
This inner disk carrier is primarily used in the ZF WG 94 series, which includes models such as WG94, WG180, WG200, and WG210. It is also compatible with select WG 92 series variants that share the same clutch pack architecture. Always verify fitment by cross-referencing your transmission’s serial number with the 4661.373.007 SKU. The carrier works in conjunction with the TRANSMISSION HOUSING and HOUSING II to ensure proper oil flow and structural integrity.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101018 | TRANSMISSION HOUSING | Encloses the gear train and supports the carrier assembly |
| 4661301050 | HOUSING II | Secondary housing that aligns the output shaft |
| 4661301093 | TUBE | Directs hydraulic fluid to the clutch packs |
| 0631306174 | CYLINDRICAL PIN | Locates and secures the carrier to the housing |
| 0769123894 | TYPE PLATE | Identification tag for transmission model |
| 0750100022 | SCREW PLUG | Seals oil passages in the housing |
| 0636302602 | SCREW PLUG | Drain or fill port plug |
| 0634100633 | O-RING | Prevents fluid leaks between mating surfaces |
| 4661301029 | NOZZLE | Sprays lubricant onto gear teeth |
| 4661301027 | NOZZLE | Secondary lubrication nozzle for clutch cooling |

