Overview
The ZF 4108.306.101 CLUTCH BODY is a precision-machined hydraulic component that serves as the central actuation hub within the WG100, WG130, and WG131 transmission assemblies. This OEM genuine part directs oil flow to engage and disengage the clutch packs, directly controlling torque transfer between the engine and driveline. As a critical wear item, the clutch body interfaces directly with the TRANSMISSION HOUSING and the HOUSING to maintain proper alignment and sealing. The SKU 4108.306.101 is factory-spec for all rebuilds requiring original ZF tolerances.
Symptoms of Failure
- Delayed or harsh gear engagement: When the clutch body’s internal bores wear, hydraulic pressure drops, causing a noticeable lag when shifting from Neutral to Drive or Reverse.
- Intermittent gear slipping under load: Worn sealing surfaces allow oil to bypass the clutch piston, resulting in torque loss during acceleration or hill climbing.
- External oil seepage at the bell housing: Cracks or porosity in the clutch body casting can cause ATF to leak past the SCREW PLUG ports, leaving puddles under the transmission.
- Erratic shift quality with fluctuating RPM: A failing clutch body fails to maintain consistent clutch pack pressure, causing the engine to flare between shifts.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number (SKU) | 4108.306.101 |
| Material | High-strength cast aluminum alloy |
| Weight | 2.85 kg (6.28 lbs) |
| Overall Diameter | 185 mm |
| Overall Height | 95 mm |
| Bore Diameter (Piston) | 72 mm |
| OEM Reference | ZF 4108.306.101 |
| Seal Grooves | 2 (input/output) |
Compatibility
This clutch body is engineered for ZF WG-series powershift transmissions, specifically the WG100, WG130, and WG131 models. It is also compatible with the WG180 and WG200 series when used in conjunction with the correct INTERM.GEARBOX adapter. Always verify the casting number on your original part before ordering. The unit mounts directly to the TRANSMISSION HOUSING and is secured using the HEXAGON SCREW kit. For oil level verification, pair this part with the OIL LEVEL GAGE to ensure proper fill during installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101128 | TRANSMISSION HOUSING | Encloses gear train and supports clutch body |
| 4108201296 | HOUSING | Secondary casing for valve body assembly |
| 4475280018 | SCREW PLUG | Seals hydraulic ports in clutch body |
| 0501215601 | OIL LEVEL GAGE | Dipstick for fluid level verification |
| 4108303034 | COVER | Protects clutch pack access opening |
| 0636015120 | HEXAGON SCREW | Fastener for clutch body retention |
| 0636302015 | SCREW PLUG | Drain/fill port plug for transmission |
| 0501325471 | SEALING RING | O-ring for hydraulic pressure integrity |
| 0730365280 | TYPE PLATE | Identification tag for transmission model |
| 4108108026 | INTERM.GEARBOX | Intermediate gearbox adapter for WG-series |
