Overview
The ZF 0736.302.003 SCREW PLUG is a precision-engineered sealing component designed for use in the hydraulic control circuits of ZF WG100, WG130, and WG131 transmissions. This OEM genuine part, identified by SKU 0736.302.003, functions as a critical port closure within the valve body or main housing assembly, preventing pressurized transmission fluid from escaping while maintaining system integrity. It is typically installed in threaded bores that provide access to oil galleries or sensor ports. For complete housing integrity, this screw plug is often paired with the 4108101031 HOUSING or the 4108303155 HOUSING to ensure a leak-free seal under high operating pressures.
Symptoms of Failure
- Transmission fluid seepage around the plug head: A worn or corroded 0736.302.003 screw plug will allow ATF to weep past the threads, leaving visible oil stains on the transmission casing or bell housing.
- Erratic shift quality due to pressure loss: When this plug fails to seal, hydraulic pressure drops in the control circuit, causing delayed engagement or harsh shifting between gears.
- Low fluid level warnings without visible puddles: A slow leak from the screw plug can lead to gradual fluid loss, triggering dashboard warnings while the leak remains hidden under accumulated dirt.
- Contaminated transmission fluid: A compromised seal allows moisture or debris to enter through the plug bore, leading to sludge formation and accelerated wear on internal components.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 0736.302.003 |
| Type | Hexagon Socket Screw Plug |
| Thread Size | M18 x 1.5 (estimated) |
| Overall Length | 22 mm |
| Head Diameter | 24 mm |
| Material | Steel, zinc-plated |
| Sealing Method | Integrated O-ring or copper washer |
| Weight | 0.04 kg |
| OEM Reference | ZF 0736.302.003 |
| Torque Specification | 35 Nm (estimated) |
Compatibility
This genuine ZF screw plug is specifically engineered for the WG100, WG130, and WG131 series transmissions. It is also compatible with the WG180 and WG200 models when used in identical port locations. The 0736.302.003 is commonly replaced alongside the 0636302015 SCREW PLUG in multi-plug assemblies. For complete sealing of adjacent ports, technicians often install the 0630361037 SEALING CAP to protect exposed bores from contamination. Always verify thread pitch and depth against your specific transmission housing before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4108101031 | HOUSING | Main transmission housing for WG series |
| 4108303155 | HOUSING | Rear housing cover assembly |
| 0636302015 | SCREW PLUG | Alternate port plug for oil drain |
| 0630361037 | SEALING CAP | Protective cap for unused ports |
| 0730361010 | SEALING CAP | Threaded cap for sensor ports |
| 0736305007 | SCREW PLUG | High-torque plug for pressure ports |
| 0634801165 | SEALING RING | Copper washer for plug sealing |
| 0730365280 | TYPE PLATE | Identification plate for transmission |
| 0631311009 | GROOVED STUD | Alignment stud for housing assembly |
| 4108108019 | INTERM.GEARBOX | Intermediate gearbox assembly |
