Overview
The ZF 4642.308.549 AXLE is a critical load-bearing component engineered specifically for the WG 150 Series transmission assembly. This OEM genuine part functions as the primary rotational support shaft within the planetary gearset, ensuring precise alignment of gears and clutches during high-torque operations. The SKU 4642.308.549 sits centrally in the transmission housing, interfacing directly with the differential and output shaft to transfer power smoothly. Its hardened steel construction resists fatigue from constant heavy-duty cycles, making it essential for maintaining drivetrain integrity in commercial vehicles and industrial machinery.
Symptoms of Failure
- Oil leaks near the axle seal: Worn bearing surfaces on the 4642.308.549 can cause seal misalignment, leading to visible transmission fluid drips under the vehicle.
- Gear slipping under load: A fatigued axle allows excessive radial play, causing intermittent disengagement of clutch packs and erratic power delivery.
- Whining or grinding noise from the transmission center: Degraded axle journals create metal-on-metal contact, producing a distinct high-pitched whine during acceleration or deceleration.
- Vibration through the chassis: Uneven wear on the axle surface induces harmonic vibrations that intensify at highway speeds, often misdiagnosed as wheel imbalance.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.308.549 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 312 mm |
| Journal Diameter | 48 mm |
| Weight | 4.2 kg |
| OEM Reference | ZF 4642.308.549 |
| Surface Hardness | 58-62 HRC |
Compatibility
This axle is designed for the ZF WG 150 Series, but its mounting geometry and spline count also suit the WG 180 and WG 200 models when paired with the correct 4642306254: ADAPTER. It is not compatible with the WG 120 or WG 250 series without significant modification. Always verify the axle bore alignment with the 4642101108: TRANSMISSION HOUSING and the 4642301208: TRANSMISSION HOUSING to ensure proper fitment. The 0730365125: TYPE PLATE should be checked for the exact series designation, while the 0631311009: GROOVED STUD secures the axle end cap.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses the axle and gearset |
| 4642301208 | TRANSMISSION HOUSING | Alternate housing for WG 150 variants |
| 0730365125 | TYPE PLATE | Identifies transmission model and specs |
| 0631311009 | GROOVED STUD | Secures axle retaining plate |
| 4642301168 | SCREEN SHEET | Filters debris from lubricating oil |
| 4642301169 | SCREEN SHEET | Fine-mesh filter for high-flow circuits |
| 0636100621 | HEXAGON SCREW | Fastens housing cover to axle support |
| 0630361029 | SEALING CAP | Prevents oil leakage at axle end |
| 4642306254 | ADAPTER | Matches axle spline to output flange |
| 0634303340 | O-RING | Seals axle-to-housing interface |
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