Overview
The ZF 6029.199.004 PLUG KIT is a critical sealing assembly designed for the WG150, WG200, and WG201 series transmissions. This OEM genuine part ensures the hydraulic circuit remains pressurized and free of contaminants by sealing the main housing access ports. The SKU 6029.199.004 is installed directly into the TRANSMISSION HOUSING (4616101116) to prevent fluid bypass during torque converter lockup and clutch pack engagement. Without this plug kit, internal pressure drops can lead to erratic shifting and premature wear on planetary gear sets.
Symptoms of Failure
- Oil leaks around the housing access port: A degraded plug kit allows transmission fluid to seep past the sealing surfaces, often visible as drips near the bell housing or pan rail.
- Erratic gear engagement or delayed shifts: When the plug fails, hydraulic pressure bleeds off, causing the transmission to slip between gears or hesitate when shifting from neutral to drive.
- Contaminated fluid from debris ingress: A cracked or missing plug permits dirt and moisture to enter the valve body area, leading to accelerated wear on clutches and seals.
- Whining or buzzing noise from the pump: Air ingestion through a faulty plug creates cavitation in the oil pump, producing a high-pitched sound under load.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 6029.199.004 |
| Material | Steel with nitrile rubber sealing element |
| Outer Diameter | 24.5 mm |
| Thread Pitch | M22 x 1.5 |
| Weight | 0.045 kg |
| OEM Reference | ZF 6029.199.004 |
| Sealing Torque | 35 Nm |
Compatibility
This plug kit is engineered for ZF WG-series transmissions including the WG150, WG200, WG201, and WG65 models. It is a direct replacement for the factory-installed plug found in the HOUSING (4616301307) and HOUSING (4616301309) assemblies. When replacing this part, always inspect the mating threads and use a new HEXAGON SCREW (0636011118) to ensure proper clamping force. The kit is not compatible with ZF Ecomat or AS Tronic series without adapter plates.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4616101116 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 0636011118 | HEXAGON SCREW | Fastener for housing cover |
| 4616301307 | HOUSING | Intermediate housing for clutch pack |
| 4616301309 | HOUSING | Rear housing for output shaft |
| 0636011038 | HEXAGON SCREW | Bolt for valve body attachment |
| 0636016015 | HEXAGON SCREW | Flange bolt for oil pan |
| 0631306085 | CYLINDRICAL PIN | Alignment dowel for housing halves |
| 0634313118 | O-RING | Static seal for hydraulic passages |
| 0636304019 | SCREW PLUG | Drain port closure |
| 0634801152 | SEALING RING | Copper washer for high-pressure joints |
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