Overview
The ZF 4642.302.118 INPUT SHAFT is a critical torque-transfer component engineered specifically for the WG 150 Series transmission. This OEM genuine part, identified by SKU 4642.302.118, sits at the front of the gearbox, directly coupling the engine’s output to the planetary gear set. It absorbs high rotational loads and ensures precise power delivery through the transmission housing. When replacing this shaft, it is common to inspect the TRANSMISSION HOUSING for wear, as misalignment can accelerate input shaft failure. The part is precision-machined to ZF’s exacting tolerances, guaranteeing a direct fit without modification.
Symptoms of Failure
When the ZF 4642.302.118 INPUT SHAFT begins to degrade, operators typically notice these specific failure indicators:
- Oil leaks at the front seal area – Worn splines or shaft scoring allow transmission fluid to escape, often visible as drips under the bell housing.
- Gear slipping under load – A damaged input shaft cannot maintain proper engagement with the clutch pack, causing intermittent power loss during acceleration.
- Abnormal vibration or whining noise – Bearing surface wear on the shaft creates harmonic vibrations that intensify with engine RPM.
- Hard shifting or delayed engagement – Excessive axial play in the shaft disrupts hydraulic pressure timing, leading to rough gear changes.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4642.302.118 |
| Overall Length | 385 mm (estimated) |
| Spline Diameter | 42 mm (estimated) |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Weight | 4.2 kg (estimated) |
| OEM Reference | ZF 4642.302.118 (Genuine) |
| Surface Treatment | Black oxide or phosphate coating |
Compatibility
This INPUT SHAFT is primarily designed for the ZF WG 150 Series transmission. Based on its spline configuration and length, it is also compatible with the WG 180 and WG 200 models in certain configurations, though cross-referencing with the TYPE PLATE is essential to confirm fitment. The shaft interfaces directly with the TRANSMISSION HOUSING and is secured using the GROOVED STUD for precise alignment. Always verify your transmission’s serial number before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101047 | TRANSMISSION HOUSING | Encloses and supports the input shaft and gear train |
| 4642301207 | TRANSMISSION HOUSING | Alternate housing variant for WG150 series |
| 0730365067 | TYPE PLATE | Identifies transmission model and serial number |
| 0631311009 | GROOVED STUD | Secures the input shaft bearing assembly |
| 4642301168 | SCREEN SHEET | Filters debris from hydraulic fluid |
| 4642301169 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 0636100621 | HEXAGON SCREW | Fastener for housing and cover plates |
| 4642301186 | SCREEN SHEET | High-flow filter for heavy-duty operation |
| 4644106300 | SHIFT SYSTEM | Controls gear selection and clutch engagement |
| 4644306500 | COVER PLATE | Seals the transmission housing access point |
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