Overview
The ZF 0730.105.979 WASHER is a precision-engineered sealing component designed for the WG 100 series transmission family. This OEM genuine part functions as a critical load-distributing and sealing interface between the transmission housing and associated hydraulic or mechanical assemblies. Installed within the valve body or clutch pack area, the washer prevents fluid bypass and maintains correct axial clearance. The SKU 0730.105.979 is manufactured to ZF’s exacting tolerances, ensuring a leak-free seal and consistent clamping force under high-pressure, high-temperature operating conditions. When paired with the TRANSMISSION HOUSING and the HOUSING, this washer completes the sealing circuit that protects internal gears and clutches from contamination.
Symptoms of Failure
- External oil seepage at housing joints: A worn or crushed 0730.105.979 washer allows transmission fluid to weep past the mating surfaces, leaving visible stains on the bell housing or under the vehicle.
- Intermittent gear engagement delay: Loss of sealing integrity reduces hydraulic pressure, causing sluggish shifts or hesitation when moving from neutral to drive.
- Increased operating noise: As the washer flattens, metal-to-metal contact between the HOUSING and adjacent components produces a faint knocking or whining sound during acceleration.
- Contaminated transmission fluid: A degraded washer can allow debris ingress, leading to dark, gritty fluid and accelerated wear on internal seals like the O-RING.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 0730.105.979 |
| Material | Steel with zinc-nickel plating (estimated) |
| Outer Diameter | 38.0 mm (approx.) |
| Inner Diameter | 24.5 mm (approx.) |
| Thickness | 2.0 mm (approx.) |
| Weight | 12 g (approx.) |
| OEM Reference | ZF 0730.105.979 |
| Surface Finish | Corrosion-resistant passivated |
Compatibility
This washer is primarily engineered for the ZF WG 100 series, including the WG100, WG120, and WG150 models. It may also be applicable to the WG180 and WG200 series when used in conjunction with the correct HOUSING and TRANSMISSION HOUSING. Always verify fitment by cross-referencing the SKU 0730.105.979 with your transmission’s parts catalog. For heavy-duty applications, pairing this washer with a fresh O-RING ensures optimal sealing performance.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101006 | TRANSMISSION HOUSING | Main structural casing for gear sets |
| 4651301034 | HOUSING | Secondary housing for valve body assembly |
| 0634303928 | O-RING | Static seal for hydraulic circuits |
| 4651301013 | HOUSING | Adapter housing for clutch pack |
| 4651301015 | SCREEN SHEET | Filter mesh for fluid debris |
| 4651301035 | SCREEN SHEET | Secondary filter element |
| 0630361028 | SEALING CAP | Port closure for pressure testing |
| 4475280060 | SCREW PLUG | Threaded drain or fill plug |
| 0634303312 | O-RING | Seal for screw plug interface |
| 0630361063 | SEALING CAP | High-temp cap for vent ports |
