Overview
The ZF 4699.100.080 BASIC GEARBOX is a precision-machined core assembly designed for the WG100, WG130, and WG131 series transmissions. This OEM genuine part functions as the primary power transfer hub, housing the gear train and supporting the input and output shafts within the transmission casing. As a complete basic gearbox unit, SKU 4699.100.080 replaces the entire internal gear set and shaft carrier, ensuring that the transmission can maintain correct gear meshing and torque distribution under heavy-duty industrial loads. It is a critical component for restoring full driveline integrity during a major overhaul.
Symptoms of Failure
- Excessive gear whine or grinding noise during acceleration: When the 4699.100.080 basic gearbox wears, bearing clearances increase, causing audible metal-on-metal contact that worsens under load.
- Intermittent gear slipping under high torque: Worn internal splines or gear teeth within the basic gearbox can cause the transmission to momentarily lose power transfer, especially when climbing or hauling heavy loads.
- Metallic debris in the transmission oil pan: Flaking or pitting on the gearbox housing or gear faces produces visible metal particles during routine oil changes, indicating imminent failure of the 4699.100.080 unit.
- Oil seepage from the main housing joint: Distortion of the basic gearbox casing can compromise the sealing surface, leading to slow oil leaks around the mating flange.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number (SKU) | 4699.100.080 |
| Product Type | Basic Gearbox Assembly |
| Material | Case-hardened alloy steel with cast iron housing |
| Overall Length | Approx. 320 mm |
| Overall Width | Approx. 180 mm |
| Overall Height | Approx. 200 mm |
| Weight | 12.4 kg (27.3 lbs) |
| OEM Reference | ZF 4699.100.080 |
| Gear Ratio Range | 1:1 to 1:1.5 (direct drive variant) |
Compatibility
This basic gearbox is engineered for the ZF WG100, WG130, and WG131 transmission models. It is also compatible with the WG180 and WG200 series when used in conjunction with the correct adapter housing. The 4699.100.080 fits all standard industrial and marine applications using these ZF gearboxes. Always verify your transmission model tag before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 0634309122 | Shaft Seal | Prevents oil leakage at the output shaft exit point |
| 0634801038 | Sealing Ring | Provides a static seal between the gearbox housing and cover |
| 0630000091 | Shim Ring | Adjusts axial play for precise bearing preload |
| 0630000255 | Shim Ring | Fine-tunes gear mesh depth during assembly |
| 0630000058 | Shim Ring | Spacer for input shaft bearing stack |
| 0630000059 | Shim Ring | Spacer for output shaft bearing stack |
| 0630000061 | Shim Ring | Adjusts intermediate shaft end float |
| 0501341241 | Wheel Stud | Secures the gearbox to the mounting flange |
| 0750117782 | Tapered Roller Bearing | Supports radial and axial loads on the main shaft |
| 0750117784 | Tapered Roller Bearing | Supports radial and axial loads on the countershaft |
