Overview
The ZF 6029.201.733 PLUG is a critical sealing component engineered for the WG 200 Series transmission. This OEM genuine part functions as a threaded closure within the transmission housing, preventing fluid loss and maintaining hydraulic pressure essential for clutch engagement and gear shifts. The SKU 6029.201.733 is precision-machined to interface directly with the 4644101249: TRANSMISSION HOUSING and the 4644301402: TRANSMISSION HOUSING, ensuring a leak-proof seal under high thermal and pressure loads. As an OEM component, it guarantees exact fitment and material compatibility with the WG200 transmission architecture.
Symptoms of Failure
- Transmission fluid seepage around the plug bore: A worn or corroded 6029.201.733 plug will allow ATF to escape, leaving visible oil stains on the transmission casing and under the vehicle. This is often the first sign of a failing plug.
- Erratic gear engagement or slipping: When the plug fails to seal, hydraulic pressure drops within the valve body, causing delayed shifts or gear slippage during acceleration. This symptom is frequently misdiagnosed as a solenoid issue.
- Contaminated transmission fluid: A compromised plug can allow moisture or debris to enter the system through the housing interface, leading to oxidized fluid and reduced lubrication performance.
- Audible air hissing from the transmission: In severe cases, a loose or cracked plug will create a vacuum leak, producing a faint hissing sound during operation, particularly under load.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 6029.201.733 |
| Material | Steel with zinc-nickel plating |
| Thread Size | M18 x 1.5 |
| Overall Length | 22 mm |
| Head Diameter | 24 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 6029.201.733 |
| Sealing Type | Metal-to-metal with integrated O-ring groove |
Compatibility
This plug is specifically designed for the ZF WG 200 Series transmission family, including the WG180, WG200, and WG210 models. It is a direct replacement for the plug found in the main valve body cover and the rear housing section. The 6029.201.733 interfaces with the 4644301298: COVER PLATE and requires the 0634306323: O-RING for proper sealing. It is also used in certain ZF Ecomat 4HP and 5HP transmissions that share the WG200 housing architecture.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0636305026 | SCREW PLUG | Secondary drain plug for oil pan |
| 4644301279 | SCREEN SHEET | Filter mesh for hydraulic circuit |
| 4644301088 | SEALING CAP | Protective cap for pressure test ports |
| 4644159357 | SHIFT SYSTEM | Mechanical shift valve assembly |
| 4644306513 | COVER | Side cover for valve body access |
| 4644306555 | COVER | Rear housing cover plate |
