Overview
The ZF 4660.306.196 INTERMEDIATE SHEET is a precision-engineered steel plate positioned between the clutch pack and the piston housing within the WG92 and WG98 transmission series. This OEM genuine part acts as a critical separator, ensuring proper oil flow distribution and load transfer during gear shifts. The SKU 4660.306.196 is specifically designed to maintain the correct clearance between rotating and stationary components, preventing metal-on-metal contact that can lead to catastrophic transmission failure. It sits directly within the intermediate housing assembly, adjacent to the TRANSMISSION HOUSING and the HOUSING II, forming a sealed chamber for hydraulic pressure regulation.
Symptoms of Failure
- Delayed or harsh gear engagement: When the intermediate sheet warps or develops surface scoring, hydraulic pressure bleeds unevenly, causing noticeable lag when shifting from neutral to drive or reverse.
- Transmission oil leaks at the housing seam: A deformed intermediate sheet compromises the seal between the TRANSMISSION HOUSING and the HOUSING II, leading to external oil seepage visible around the bell housing area.
- Intermittent gear slipping under load: Worn intermediate sheets fail to maintain proper clutch pack clearance, resulting in temporary power loss when climbing grades or towing heavy loads.
- Metallic debris in transmission fluid: As the sheet wears, microscopic steel particles contaminate the oil, often visible as glitter during routine fluid changes.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4660.306.196 |
| Material | Case-hardened steel (DIN 1.7131) |
| Outer Diameter | 195 mm ± 0.5 mm |
| Inner Diameter | 142 mm ± 0.3 mm |
| Thickness | 2.5 mm ± 0.05 mm |
| Weight | 0.42 kg |
| Surface Finish | Ground, Ra ≤ 0.8 µm |
| OEM Reference | ZF 4660.306.196 |
| Hardness | HRC 58-62 |
Compatibility
This intermediate sheet is engineered for ZF WG92 and WG98 series transmissions, which include models such as WG180, WG200, WG210, and WG250. It is also compatible with select WG120 and WG150 variants produced after 2005. The part interfaces directly with the CYLINDRICAL PIN for alignment and the TYPE PLATE for identification. Always verify your transmission serial number against the ZF parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660101017 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4660301054 | HOUSING II | Intermediate housing for clutch assembly |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing positioning |
| 0769123894 | TYPE PLATE | Identification plate with transmission specs |
| 0750100022 | SCREW PLUG | Seals oil passages in housing |
| 4660221029 | SUCTION TUBE | Oil pickup tube for pump |
| 0634100317 | O-RING | Static seal between housings |
| 0636103273 | CAP SCREW | Fastener for housing assembly |
| 0634306311 | O-RING | Seal for suction tube connection |
| 4660321029 | FIXING PLATE | Retains intermediate sheet in position |
