Overview
The ZF 4642.108.048 COUNTERSHAFT is a critical internal component engineered specifically for the WG150 series transmission. This OEM genuine part functions as the primary torque-transfer shaft, synchronizing gear rotation and distributing engine power through the transmission’s planetary gear sets. Positioned within the main housing assembly, the countershaft works in tandem with the 4642101108: TRANSMISSION HOUSING and the 4642301208: TRANSMISSION HOUSING to ensure precise gear alignment and load distribution. The SKU 4642.108.048 is machined to exact OEM tolerances, guaranteeing seamless integration into your existing drivetrain.
Symptoms of Failure
- Grinding or whining noise during gear engagement: A worn countershaft bearing surface or spline damage produces audible metallic sounds, especially under load. This is a common long-tail search query for “ZF WG150 countershaft noise symptoms.”
- Intermittent gear slipping or loss of power transfer: When the countershaft’s gear teeth wear unevenly, the transmission may momentarily lose torque, causing hesitation during acceleration. Search queries like “WG150 gear slipping countershaft” often lead to this part.
- Metallic debris in transmission fluid: Flaking or pitting on the countershaft surface contaminates the oil, visible as shiny particles during fluid changes. This symptom is frequently searched as “transmission metal shavings ZF WG150.”
- Vibration at specific RPM ranges: A bent or unbalanced countershaft induces harmonic vibrations, felt through the chassis. Technicians often search for “ZF countershaft vibration fix.”
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.108.048 |
| OEM Reference | ZF 4642.108.048 |
| Material | Case-hardened alloy steel (20MnCr5 equivalent) |
| Overall Length | 412 mm (estimated) |
| Diameter (max) | 48 mm (estimated) |
| Weight | 3.2 kg (estimated) |
| Spline Count | 22-tooth involute spline |
| Heat Treatment | Carburized and tempered to HRC 58-62 |
Compatibility
This genuine ZF 4642.108.048 countershaft is designed primarily for the WG150 series transmission. Based on its spline configuration and shaft length, it is also compatible with the WG180 and WG200 series models that share the same planetary gear architecture. Always verify your transmission’s serial number against the OEM parts catalog. For correct installation, ensure the 0730365125: TYPE PLATE matches your unit, and secure the assembly using the 0631311009: GROOVED STUD to prevent axial play.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses gear train and supports countershaft bearings |
| 4642301208 | TRANSMISSION HOUSING | Secondary housing section for output shaft assembly |
| 0730365125 | TYPE PLATE | Identification plate with transmission model and serial number |
| 0631311009 | GROOVED STUD | Locating pin for countershaft alignment |
| 4642301168 | SCREEN SHEET | Oil filter screen for debris protection |
| 4642301169 | SCREEN SHEET | Secondary oil filter screen (fine mesh) |
| 0636100621 | HEXAGON SCREW | Fastener for housing cover attachment |
| 0630361029 | SEALING CAP | Seals hydraulic passages against leakage |
| 4642306254 | ADAPTER | Interface plate for auxiliary pump mounting |
| 0634303340 | O-RING | Hydraulic seal for housing joint surfaces |
