Overview
The ZF 6029.201.034 PLUG (SKU: 6029.201.034) is an OEM genuine sealing component engineered for the WG150, WG200, WG201, and WG65 series transmissions. This precision-machined plug is installed directly into the TRANSMISSION HOUSING to seal critical fluid passages and prevent contamination. It functions as a positive stop for internal lubrication circuits, ensuring consistent oil pressure to the planetary gear sets. When paired with a HEXAGON SCREW for secure retention, this plug maintains the hydraulic integrity required for smooth clutch engagement and torque converter operation.
Symptoms of Failure
- External oil seepage around the housing: A worn or corroded 6029.201.034 plug allows transmission fluid to weep past the sealing face, leaving visible drips on the bell housing or oil pan.
- Intermittent gear slipping under load: When the plug fails to seal, internal oil pressure drops, causing delayed or soft shifts in the WG150 and WG200 series.
- Contaminated fluid with metallic debris: A loose plug can vibrate against the HOUSING (part 4616301307), generating fine metal particles that circulate through the valve body.
- Erratic engagement in reverse gear: Loss of sealing at the plug location starves the reverse clutch pack of lubrication, leading to harsh or delayed engagement.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 6029.201.034 |
| Material | Steel, zinc-plated |
| Thread Size | M18 x 1.5 |
| Overall Length | 22 mm |
| Hex Drive Size | 14 mm |
| Weight | 0.045 kg |
| OEM Reference | ZF 6029.201.034 |
| Sealing Method | Metal-to-metal with O-ring groove |
Compatibility
This plug is a direct-fit OEM replacement for the following ZF transmission models: WG150, WG180, WG200, WG201, and WG65 series. It is commonly used in the auxiliary housing bore where the HOUSING (4616301309) meets the main casing. Always verify the thread pitch and depth against your specific transmission variant before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101116 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 0636011118 | HEXAGON SCREW | Fastens plug and cover plates |
| 4616301307 | HOUSING | Rear housing section for output shaft |
| 4616301309 | HOUSING | Intermediate housing for planetary carrier |
| 0636011038 | HEXAGON SCREW | M10 bolt for housing flange |
| 0636016015 | HEXAGON SCREW | M12 bolt for bell housing |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing mating |
| 0634313118 | O-RING | Seal for plug groove |
| 0636304019 | SCREW PLUG | Alternative drain plug variant |
| 0634801152 | SEALING RING | Copper washer for plug base |
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