Overview
The ZF 5838.300.794 COMPRESSION SPRING is a precision-engineered component designed for the internal clutch and shift mechanisms of ZF WG-series transmissions. This OEM genuine part provides the necessary preload force to maintain consistent pressure on valve spools and shift rails, ensuring smooth gear engagement and reliable hydraulic control. Located within the valve body or shift actuator assembly, the SKU 5838.300.794 directly influences the timing and quality of gear changes. When this spring loses its tension, the entire transmission’s shift quality degrades, often requiring replacement alongside related drivetrain components such as the 2093109006 DIFFERENTIAL or the 0750117075 TAPER ROLLER BEARING to restore full operational integrity.
Symptoms of Failure
When the ZF 5838.300.794 compression spring fatigues or breaks, operators will notice distinct performance issues. Watch for these specific failure symptoms:
- Delayed or erratic gear engagement – The spring no longer provides adequate force to shift valves, causing hesitation when moving from Neutral to Drive or Reverse.
- Intermittent gear slipping under load – A worn spring allows clutch packs to release prematurely, leading to power loss during acceleration or hill climbing.
- Harsh or clunking shifts – Without proper spring tension, hydraulic pressure spikes occur, resulting in jarring gear changes that can damage the 2093209095 DIFFERENTIAL assembly.
- Transmission fluid contamination – A broken spring can shed metal fragments into the oil circuit, accelerating wear on bearings and the 2093309071 DIFF.HOUSING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 5838.300.794 |
| Spring Type | Compression Spring (Helical) |
| Wire Diameter | 2.5 mm (estimated) |
| Outer Diameter | 18.0 mm (estimated) |
| Free Length | 45.0 mm (estimated) |
| Material | Chrome Silicon Steel (oil-tempered) |
| Surface Treatment | Phosphate coated / Zinc plated |
| Weight | ~12 grams |
| OEM Reference | ZF 5838.300.794 (Genuine) |
Compatibility
This compression spring is specifically engineered for ZF WG-series transmissions. Based on its design and application, the 5838.300.794 is compatible with the following models:
- ZF WG100
- ZF WG130
- ZF WG131
- ZF WG180 (valve body variants)
- ZF WG200 (early production runs)
Always verify your transmission serial number before ordering. This spring is often replaced during a full valve body rebuild, which may also require a new 0631100223 SPRING PIN and 0730300820 THRUST WASHER to ensure proper alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 2093109006 | DIFFERENTIAL | Distributes torque between drive wheels |
| 0750117075 | TAPER ROLLER BEARING | Supports axial and radial loads on shafts |
| 2093209095 | DIFFERENTIAL | Secondary differential assembly for planetary gears |
| 2093309071 | DIFF.HOUSING | Encloses and supports differential gears |
| 0631100223 | SPRING PIN | Secures shift forks and actuator linkages |
| 0730300820 | THRUST WASHER | Reduces friction between rotating and stationary parts |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to axle shafts |
| 2097309085 | DIFFERENTIAL AXLE | Driveshaft component connecting differential to wheels |
| 5838300811 | THRUST WASHER | Controls axial clearance in planetary sets |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Meshes with axle bevel gear for torque split |
Frequently Asked Questions
Q: How do I know if my ZF WG100 needs a new 5838.300.794 spring?
A: If you experience delayed engagement when shifting from Neutral to Drive, or if the transmission slips during acceleration, the compression spring is likely fatigued. A visual inspection of the spring’s free length compared to a new OEM part can confirm wear.
Q: Can I replace this spring without removing the transmission?
A: In most WG-series transmissions, the spring is accessible after removing the valve body cover. However, we recommend a full valve body overhaul to inspect related components like the 0631100223 SPRING PIN and 0730300820 THRUST WASHER for wear.
Q: Is the 5838.300.794 spring interchangeable with other ZF part numbers?
A: No. This spring has a specific wire diameter and free length unique to WG100/WG130/WG131 valve bodies. Using a substitute can cause incorrect shift pressures and potential damage to the 2093309071 DIFF.HOUSING.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
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