Overview
The ZF 2095.352.003 PISTON is a critical hydraulic actuation component engineered for the WG100, WG130, and WG131 transmission series. This OEM genuine part converts hydraulic pressure into mechanical force to engage clutch packs and modulate gear shifts within the planetary gearset. Positioned inside the valve body and clutch drum assembly, the piston creates a sealed chamber that, when pressurized, applies axial force to the clutch stack. The SKU 2095.352.003 is precision-machined to maintain exacting tolerances, ensuring consistent shift quality and preventing internal cross-leakage. When rebuilding a transmission, this piston is often replaced alongside the 5838109007: DIFFERENTIAL to restore full hydraulic integrity.
Symptoms of Failure
- Delayed or harsh engagement – A worn 2095.352.003 piston can cause a noticeable lag when shifting from Neutral to Drive or Reverse, followed by a jarring engagement as hydraulic pressure bleeds past the seal.
- Intermittent gear slippage – As the piston loses its sealing ability, the clutch pack cannot hold full torque, resulting in RPM flare during acceleration under load.
- Internal transmission oil leaks – Cracks or scoring on the piston surface allow ATF to bypass the seal, leading to low line pressure and visible fluid seepage from the bell housing area.
- Erratic shift patterns – A failing piston causes inconsistent clutch application, making the transmission hunt for gears or skip shifts entirely during highway driving.
Technical Specifications
| Part Number | 2095.352.003 |
| Material | Hardened aluminum alloy with anodized surface |
| Outer Diameter | 95.2 mm (3.748 in) |
| Inner Diameter | 52.0 mm (2.047 in) |
| Height | 28.5 mm (1.122 in) |
| Weight | 0.34 kg (0.75 lbs) |
| OEM Reference | ZF 2095.352.003 (Genuine) |
| Seal Type | Integrated PTFE lip seal |
Compatibility
This piston is specifically designed for the ZF WG100, WG130, and WG131 series transmissions found in medium-duty trucks, buses, and off-highway equipment. It is also compatible with select variants of the WG180 and WG200 models when used in the forward clutch drum assembly. Always verify the piston bore diameter and clutch pack stack height before installation. For complete drivetrain restoration, consider pairing this piston with the 0750117075: TAPER ROLLER BEARING and the 2095209019: DIFFERENTIAL to ensure all rotating elements are properly supported.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109007 | DIFFERENTIAL | Distributes torque between output shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2095209019 | DIFFERENTIAL | Final drive torque distribution |
| 0631329086 | SPRING PIN | Secures piston alignment in clutch drum |
| 5838300817 | THRUST WASHER | Controls axial clearance in gear train |
| 5838300682 | DIFFERENTIAL AXLE | Carries differential side gears |
| 5838300811 | THRUST WASHER | Reduces friction on planetary carrier |
| 5841302064 | THRUST WASHER | Spacer for output shaft assembly |
| 5838300137 | OUTER CLUTCH DISK | Steel plate in clutch pack |
| 5838300138 | INNER CLUTCH DISK | Friction plate in clutch pack |
