Overview
The ZF 6029.199.159 PLUG KIT is a critical sealing assembly designed specifically for the WG90 and WG94 series transmissions. This OEM genuine part ensures the integrity of the hydraulic circuit by providing a leak-proof closure at key access points within the transmission housing. As a precision-engineered kit, it contains all necessary components to replace worn or damaged plugs, directly contributing to maintaining optimal oil pressure and preventing contamination. The SKU 6029.199.159 is the definitive reference for this exact sealing solution, ensuring a perfect fit and long service life when paired with the 4661101032: TRANSMISSION HOUSING and the 4661301047: HOUSING II.
Symptoms of Failure
When the ZF 6029.199.159 PLUG KIT begins to degrade, several distinct operational issues will manifest. Look for these specific failure symptoms to diagnose a worn plug kit:
- External oil leaks around the transmission housing: A compromised plug seal will allow transmission fluid to seep out, often visible as drips or wet spots near the housing joints.
- Gear slipping under load: Loss of hydraulic pressure due to a failing plug can cause erratic shifting or slipping, particularly during acceleration or when climbing grades.
- Contaminated transmission fluid: A faulty plug can allow dirt and moisture to enter the system, leading to accelerated wear of internal components like the 0631306174: CYLINDRICAL PIN and the 4661301093: TUBE.
- Audible whining or cavitation noise: Air ingress through a defective plug can cause pump cavitation, resulting in a high-pitched whine from the transmission.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 6029.199.159 |
| Type | Plug Kit (OEM Genuine) |
| Material | Steel with Nitrile Rubber Seals |
| Thread Size | M18 x 1.5 (Estimated) |
| Weight | 0.15 kg (0.33 lbs) |
| OEM Reference | ZF 6029.199.159 |
| Seal Diameter | 22 mm (Estimated) |
Compatibility
This plug kit is engineered for the ZF WG series of powershift transmissions. It is directly compatible with the following models, where it seals the main pressure ports and drain plugs:
- WG 90 Series (including WG92, WG94, WG96)
- WG 94 Series (including WG94, WG95, WG97)
- WG 180 Series (where used as a secondary seal)
- WG 200 Series (where used in auxiliary housing ports)
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4661101032 | TRANSMISSION HOUSING | Main structural casing for gear assembly |
| 4661301047 | HOUSING II | Secondary housing for clutch pack |
| 4661301093 | TUBE | Hydraulic fluid passage conduit |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0769123894 | TYPE PLATE | Identification and specification label |
| 0750100022 | SCREW PLUG | Threaded sealing plug for ports |
| 0636302602 | SCREW PLUG | Alternate thread sealing plug |
| 0634100633 | O-RING | Static seal for plug interfaces |
| 4661301041 | NOZZLE | Oil spray nozzle for gear lubrication |
| 4661301062 | NOZZLE | Secondary oil spray nozzle |
