Overview
The ZF 0730.006.266 SPACER RING is a precision-engineered OEM genuine component designed for the WG200, WG92, and WG98 transmission series. This critical shim sits between the TRANSMISSION HOUSING and the planetary gear set, maintaining exact axial clearance to prevent gear clash and ensure smooth power flow. Manufactured to ZF’s original specifications, the SKU 0730.006.266 guarantees a factory-fit tolerance that aftermarket alternatives cannot replicate. Without this spacer ring, the entire gear train loses its preload, leading to accelerated wear on adjacent bearings and shafts.
Symptoms of Failure
- Transmission oil seepage at the housing joint – A worn or compressed spacer ring allows the HOUSING to shift, breaking the seal and causing fluid to weep from the mating surface.
- Intermittent gear slipping under load – When the spacer ring loses its thickness, axial play increases, causing the clutch packs to disengage momentarily during torque application.
- Metallic grinding noise during shifting – Insufficient spacing allows gear teeth to contact the housing wall, producing a distinct high-pitched whine or grinding sound in 3rd and 4th gear.
- Hard shifting or delayed engagement – The RANGE SELECTOR cannot properly align the shift forks when the spacer ring is deformed, leading to rough or missed gear changes.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0730.006.266 |
| Inner Diameter | 82.5 mm |
| Outer Diameter | 98.0 mm |
| Thickness | 2.5 mm |
| Material | Case-hardened steel (16MnCr5) |
| Weight | 0.045 kg |
| OEM Reference | ZF 0730.006.266 |
| Surface Finish | Ground, Ra 0.8 µm |
Compatibility
This spacer ring is engineered for ZF’s heavy-duty off-highway transmission families. It is a direct fit for the WG 200 Series (including WG180 and WG200 models), the WG 90 Series, WG 92 Series, WG 94 Series, and WG 98 Series. The part also integrates with the PERIPHERALS assembly, which includes the oil pump and filter housing. Always verify your transmission’s serial number against the OEM parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Mounts oil pump, filter, and valve block to the transmission |
| 0501209818 | RANGE SELECTOR | Controls high/low range engagement via shift fork |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train |
| 4660301018 | HOUSING | Rear housing section that supports output shaft bearings |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing-to-spacer ring positioning |
| 0769123894 | TYPE PLATE | Identification tag riveted to the housing exterior |
| 4660221012 | SUCTION TUBE | Draws oil from the pan to the pump inlet |
| 0634100317 | O-RING | Seals the suction tube connection to the housing |
| 0636103273 | CAP SCREW | Fastens the spacer ring to the housing flange |
| 0750100022 | SCREW PLUG | Closes the oil gallery port in the housing |
