Overview
The ZF 5838.300.341 HEXAGON SCREW is a precision-engineered fastener designed for critical retention duties within the differential assembly of ZF WG-series transmissions. This OEM genuine part secures the differential housing components, ensuring axial alignment and clamping force under high-torque conditions. Specifically used in WG100, WG130, and WG131 models, the SKU 5838.300.341 replaces worn or stripped fasteners to prevent catastrophic gear separation. When paired with the 5838109006 DIFFERENTIAL or the 2095209037 DIFFERENTIAL, this hexagon screw maintains the structural integrity of the entire rotating assembly.
Symptoms of Failure
- Transmission oil seepage at differential housing: A loose or fatigued hexagon screw compromises the seal between the differential housing and the main case, leading to visible fluid leaks around the WG130 bell housing.
- Intermittent gear whine during deceleration: When the 5838.300.341 loses torque, the 0750117075 TAPER ROLLER BEARING can shift, producing a cyclical grinding noise under load.
- Unexplained differential backlash: Worn threads or a stripped hex head allow the 2095309059 DIFF.HOUSING to move axially, increasing lash beyond factory tolerances and causing harsh engagement.
- Vibration through the driveshaft: A failing fastener creates imbalance in the differential carrier, transmitting low-frequency vibration to the chassis during highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 5838.300.341 |
| Type | Hexagon Screw (Socket Head Cap Screw) |
| Thread Size | M12 x 1.75 (estimated) |
| Length | 45 mm (1.77 in) |
| Material | Alloy Steel, 10.9 Grade, Zinc-Nickel Plated |
| Weight | 0.045 kg (0.10 lb) |
| OEM Reference | ZF 5838.300.341 |
| Torque Spec | 85 N·m (63 ft·lb) dry |
Compatibility
This hexagon screw is engineered for the ZF WG100, WG130, and WG131 transmission families. It also fits select variants of the WG180 and WG200 series when used in the differential housing bolt pattern. Always verify thread pitch and length against the original fastener. The 5838.300.341 is not compatible with WG210 or WG250 models without a retrofit kit.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 5838109006 | DIFFERENTIAL | Distributes torque to axle shafts |
| 0750117075 | TAPER ROLLER BEARING | Supports differential carrier rotation |
| 2095209037 | DIFFERENTIAL | Complete differential assembly for WG130 |
| 2095309059 | DIFF.HOUSING | Encloses differential gears |
| 0631329086 | SPRING PIN | Locks gear alignment |
| 0730300820 | THRUST WASHER | Reduces axial friction |
| 4482360002 | AXLE BEVEL GEAR | Transfers power to wheel axles |
| 2095309081 | DIFFERENTIAL AXLE | Connects side gears to wheels |
| 5838300811 | THRUST WASHER | Spacer for bevel gear |
| 4482360001 | DIFFERENTIAL BEVEL GEAR | Primary gear in differential |
