Overview
The ZF 5838.300.010 COMPRESSION SPRING is a precision-engineered OEM genuine component designed for the WG100, WG130, and WG131 transmission series. This spring plays a critical role in maintaining consistent pressure within the clutch pack assembly, ensuring smooth engagement and disengagement of gears. Located within the hydraulic control unit, the 5838.300.010 spring counteracts axial forces to prevent premature wear on adjacent components. When paired with a 5838109007 DIFFERENTIAL, this spring helps stabilize torque distribution across the drivetrain. Its helical design and exacting material composition are engineered to withstand millions of cycles under high-temperature transmission fluid.
Symptoms of Failure
- Delayed or harsh shifting: A worn 5838.300.010 spring reduces clutch pack clamping force, causing noticeable hesitation or jarring gear changes.
- Intermittent gear slipping under load: When the compression spring loses tension, the clutch discs cannot fully engage, leading to power loss during acceleration.
- Unusual hydraulic noise: A fatigued spring may allow valve bodies to rattle, producing a low-frequency hum or metallic chatter from the transmission pan.
- Erratic pressure fluctuations: Inconsistent spring force disrupts hydraulic circuit balance, often triggering diagnostic trouble codes for line pressure faults.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.010 |
| Material | Chrome-silicon alloy steel (SAE 9254) |
| Wire Diameter | 3.2 mm |
| Outer Diameter | 28.5 mm |
| Free Length | 45.0 mm |
| Spring Rate | 12.5 N/mm |
| Surface Treatment | Zinc phosphate + oil coating |
| Weight | 0.018 kg |
| OEM Reference | ZF 5838.300.010 |
Compatibility
This compression spring is engineered for ZF WG-series transmissions, specifically the WG100, WG130, and WG131 models. It is also compatible with select WG180 and WG200 variants that share the same clutch pack architecture. For optimal performance, always replace the spring alongside the 0750117075 TAPER ROLLER BEARING and the 2095209019 DIFFERENTIAL when rebuilding the hydraulic unit. The spring interfaces directly with the 0631329086 SPRING PIN that secures the valve body assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838300817 | THRUST WASHER | Reduces axial friction between rotating shafts |
| 5838300682 | DIFFERENTIAL AXLE | Transfers torque to planetary gear sets |
| 5838300811 | THRUST WASHER | Controls end-play in differential assembly |
| 5841302064 | THRUST WASHER | Supports high-load bearing surfaces |
| 5838300137 | OUTER CLUTCH DISK | Provides friction surface for clutch engagement |
| 5838300138 | INNER CLUTCH DISK | Transfers torque through clutch pack |
