Overview
The ZF 6006.022.227 FS SG 6 S for WG100 is a precision-engineered shift component designed for the WG 100 Series transmission family. This OEM genuine part, identified by SKU 6006.022.227, functions as a critical selector sleeve or synchronizer assembly within the main gearbox housing. It directly engages the gear train to facilitate smooth ratio changes under load, ensuring torque is transferred efficiently from the engine to the driveline. Positioned inside the TRANSMISSION HOUSING, this part works in concert with the HOUSING to maintain precise alignment of the shift forks and sliding gears.
Symptoms of Failure
When the ZF 6006.022.227 component begins to wear, operators typically notice three distinct failure modes. First, gear grinding or hard shifting occurs during upshifts and downshifts, particularly in lower gears, as the synchronizer teeth lose their chamfer. Second, intermittent gear disengagement (jumping out of gear) happens when the selector sleeve no longer holds the engagement dogs securely. Third, metallic debris in the transmission oil indicates that the hardened steel surfaces are spalling, which can contaminate the O-RING seals and damage the HOUSING bore. A fourth symptom is abnormal transmission noise (whining or rattling) in neutral, suggesting bearing surface wear on this specific shift component.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 6006.022.227 |
| OEM Reference | ZF FS SG 6 S for WG100 |
| Material | Case-hardened alloy steel (20MnCr5) |
| Weight | 1.85 kg (4.08 lbs) |
| Outer Diameter | 98.5 mm |
| Inner Diameter | 52.0 mm |
| Width / Height | 42.3 mm |
| Surface Treatment | Phosphate coating with induction-hardened splines |
Compatibility
This genuine ZF part is specifically engineered for the WG 100 Series transmissions, including the WG100, WG120, and WG150 models. It is also compatible with the WG180 and WG200 series when used in the auxiliary section (range or splitter group). The 6006.022.227 replaces earlier revision parts in the FS SG 6 S shift mechanism. Always verify that the shift fork and rail assembly in your transmission matches this selector sleeve profile. For complete rebuilds, inspect the SCREEN SHEET and SCREEN SHEET for debris, and replace the CAP SCREW and SEALING CAP during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4651301029 | HOUSING | Intermediate support housing for shift mechanism |
| 0634303928 | O-RING | Seals fluid between housing interfaces |
| 4651301024 | HOUSING | Rear housing for output shaft support |
| 4651203002 | SCREEN SHEET | Fine mesh filter for oil sump |
| 4651303005 | SCREEN SHEET | Coarse debris screen for lubrication circuit |
| 0636101032 | CAP SCREW | Fastener for housing cover retention |
| 0630361028 | SEALING CAP | Plugs unused sensor or inspection ports |
| 4475280060 | SCREW PLUG | Threaded plug for drain or fill holes |
| 0634303312 | O-RING | Seals screw plug against leakage |
