Overview
The ZF 6029.201.966 PLUG is a critical sealing component engineered specifically for the WG90 and WG94 series transmissions. This OEM genuine part (SKU: 6029.201.966) serves as a primary port closure, preventing fluid contamination and maintaining hydraulic pressure integrity within the transmission housing assembly. Positioned on the exterior casing, it interfaces directly with the TRANSMISSION HOUSING and the HOUSING II to create a leak-proof seal. Manufactured to ZF’s exacting tolerances, this plug ensures that the internal lubrication system remains isolated from external debris, a function vital for long-term gear train reliability.
Symptoms of Failure
When the ZF 6029.201.966 plug degrades, operators typically encounter these specific failure indicators:
- Hydraulic fluid seepage around the WG90/WG94 casing: A visible oil film or drip near the plug location often signals a compromised seal, leading to gradual fluid loss.
- Contaminated transmission oil: A worn plug allows dirt and moisture ingress, causing premature wear on bearings and synchronizers.
- Intermittent gear engagement hesitation: Pressure drops from a failing plug can cause delayed clutch pack activation, particularly under load.
- Corrosion or thread galling on the housing port: A seized or stripped plug can damage the TUBE interface, requiring additional repairs.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 6029.201.966 |
| Material | Steel with zinc-nickel plating |
| Thread Size | M22 x 1.5 (estimated) |
| Overall Length | 28 mm |
| Hex Size | 17 mm |
| Weight | 0.04 kg |
| OEM Reference | ZF 6029.201.966 |
| Sealing Method | Integrated O-ring groove |
Compatibility
This plug is designed for ZF’s WG series powershift transmissions, specifically the WG90 and WG94 models. It is also compatible with the WG180, WG200, and WG210 variants where the same port geometry is used. The part interfaces with the CYLINDRICAL PIN alignment feature and the NOZZLE assembly within the lubrication circuit. Always verify the thread pitch against your transmission’s service manual before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101032 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4661301047 | HOUSING II | Secondary housing for valve body |
| 4661301093 | TUBE | Oil passage conduit |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing |
| 0769123894 | TYPE PLATE | Identification tag |
| 0750100022 | SCREW PLUG | Threaded port closure |
| 0636302602 | SCREW PLUG | Drain port plug |
| 0634100633 | O-RING | Static seal for plug |
| 4661301041 | NOZZLE | Lubrication jet |
| 4661301062 | NOZZLE | Secondary lubrication jet |
