Overview
The ZF 4108.303.289 PIN is a precision-machined locating and alignment component engineered for the WG100, WG130, and WG131 series transmissions. This OEM genuine part ensures correct positioning of internal assemblies within the gearbox housing, preventing axial movement and maintaining gear mesh accuracy. The SKU 4108.303.289 is installed directly into the TRANSMISSION HOUSING and works in concert with the HOUSING to secure critical drivetrain elements. Without this pin, the transmission cannot maintain its structural integrity under load.
Symptoms of Failure
- Transmission housing misalignment and gear whine: When the pin wears or shears, the housing shifts, causing audible whining during acceleration. This is a common “ZF transmission noise” complaint.
- Oil seepage at housing mating surfaces: A worn pin allows the SCREW PLUG and housing joint to separate slightly, leading to slow oil leaks that worsen over time.
- Erratic gear engagement and hard shifting: Loss of pin alignment causes the shift forks to bind, producing a “stuck in gear” sensation that mechanics often misdiagnose as a clutch issue.
- Premature bearing failure: Misalignment from a degraded pin places uneven stress on output bearings, detectable as a low rumble at highway speeds.
Technical Specifications
| Parameter | Value |
|---|---|
| OEM Part Number | 4108.303.289 |
| Material | Case-hardened alloy steel (C45E) |
| Diameter (shaft) | 12 mm |
| Overall Length | 48 mm |
| Weight | 0.045 kg |
| Surface Finish | Zinc-plated (ISO 4042) |
| Hardness | HRC 58-62 |
| OEM Reference | ZF 4108.303.289 |
Compatibility
This pin is specifically designed for ZF WG-series powershift transmissions. Confirmed compatible models include: WG100, WG130, WG131, WG180, WG200, and select WG150 variants. It also fits the INTERM.GEARBOX assembly used in off-highway equipment. Always verify your transmission serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101128 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4108201296 | HOUSING | Secondary housing for clutch pack |
| 4475280018 | SCREW PLUG | Seals hydraulic passages |
| 0501215601 | OIL LEVEL GAGE | Dipstick for fluid level check |
| 4108303034 | COVER | Protective cover for valve body |
| 0636015120 | HEXAGON SCREW | Fastener for housing bolts |
| 0636302015 | SCREW PLUG | Drain plug for oil pan |
| 0501325471 | SEALING RING | O-ring for plug sealing |
| 0730365280 | TYPE PLATE | Identification nameplate |
| 4108108026 | INTERM.GEARBOX | Intermediate gearbox assembly |
Frequently Asked Questions
Q: Can I reuse the old pin if it looks undamaged?
No. ZF recommends replacing the 4108.303.289 pin whenever the transmission housing is separated. Even microscopic wear can cause future misalignment.
Q: Does this pin require a specific torque for installation?
Yes. The pin is press-fit into the housing bore. Use a drift punch and hammer; no torque value applies. Ensure the pin sits flush with the housing face.
Q: Will this pin fit the WG180 with the updated housing?
Yes. The 4108.303.289 pin is dimensionally identical across all WG100-WG200 variants. However, always cross-reference your housing part number with the HOUSING listing to confirm compatibility.
📞 Need this part? Contact our ZF specialists:
Email: info@partszf.com |
Phone: +86 158 2286 3467 |
Request a Quote →
