Overview
The ZF 6029.201.706 PLUG is a critical sealing component engineered specifically for the WG92 and WG98 transmission series. This OEM genuine part functions as a hydraulic or access port plug, ensuring that transmission fluid remains contained under high pressure and temperature conditions. Positioned within the main valve body or housing assembly, the 6029.201.706 plug prevents contaminants from entering the system while maintaining the precise internal pressure required for clutch engagement and gear shifts. This genuine ZF part is manufactured to exact OEM tolerances, guaranteeing a secure fit when installed alongside the 4660101017: TRANSMISSION HOUSING and the 4660301054: HOUSING II.
Symptoms of Failure
- Transmission fluid seepage around the plug bore: A worn or corroded 6029.201.706 plug often results in slow oil weeping, leaving visible residue on the housing exterior. This is a common long-tail search query for “ZF WG92 oil leak around plug.”
- Intermittent low hydraulic pressure warnings: When the plug fails to seal, internal pressure drops can trigger dashboard alerts or erratic shifting, particularly during heavy load operations.
- Contaminated transmission fluid: A compromised plug allows dirt and moisture ingress, leading to sludge buildup and accelerated wear on internal components like the 0631306174: CYLINDRICAL PIN.
- Audible air hissing from the transmission housing: In severe cases, a loose plug permits air entry, causing cavitation noise during gear changes.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 6029.201.706 |
| Material | Steel with zinc-nickel plating |
| Thread Size | M18 x 1.5 (estimated) |
| Overall Length | 22 mm |
| Hex Drive Size | 17 mm |
| Weight | 0.045 kg |
| OEM Reference | 6029.201.706 |
| Sealing Type | Metal-to-metal with O-ring groove |
Compatibility
This plug is a direct-fit component for the ZF WG92 and WG98 transmission series, which are widely used in heavy-duty off-highway vehicles and industrial machinery. Based on its design and thread pattern, the 6029.201.706 is also compatible with the ZF WG180, WG200, and WG250 models that share the same housing architecture. Always verify the plug location against your specific transmission assembly, particularly when replacing the 0769123894: TYPE PLATE which identifies the exact model variant.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0750100022 | SCREW PLUG | Secondary sealing plug for drain ports |
| 4660221029 | SUCTION TUBE | Fluid intake conduit from the sump |
| 0634100317 | O-RING | Elastomeric seal for plug grooves |
| 0636103273 | CAP SCREW | Fastener for housing cover retention |
| 0634306311 | O-RING | High-temperature seal for valve body |
| 4660321029 | FIXING PLATE | Retention bracket for plug alignment |
