Overview
The ZF 4660.133.002 GEARBOX is a precision-engineered OEM genuine component designed specifically for the WG200 and WG92 series transmissions. This gearbox assembly serves as the primary torque multiplication and speed reduction unit within the drivetrain, positioned between the torque converter and the output shaft. As a critical power transfer element, the SKU 4660.133.002 ensures smooth gear engagement and reliable performance under heavy-duty industrial loads. When replacing this unit, it is essential to also inspect the 4660198001 PERIPHERALS assembly, as these components work in tandem to maintain hydraulic pressure and lubrication flow.
Symptoms of Failure
- Delayed or harsh gear engagement: When the 4660.133.002 gearbox wears, operators may notice a significant lag between shifting and actual gear engagement, often accompanied by a jarring clunk.
- Persistent oil leaks near the bell housing: Worn seals or cracked gearbox casings cause transmission fluid to seep out, leaving visible puddles under the vehicle and leading to low fluid levels.
- Whining or grinding noises during acceleration: Damaged gear teeth or bearing failures inside the gearbox produce a high-pitched whine or metallic grinding sound, especially under load.
- Intermittent gear slipping under load: The transmission may momentarily lose power delivery, causing the engine to rev without proportional vehicle movement, a clear sign of internal gearbox distress.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4660.133.002 |
| OEM Reference | ZF 4660.133.002 |
| Material | High-strength alloy steel with hardened gear teeth |
| Weight | Approximately 18.5 kg (40.8 lbs) |
| Overall Length | 320 mm |
| Overall Width | 210 mm |
| Overall Height | 195 mm |
| Input Spline Count | 14 |
| Output Flange Bolt Pattern | 8 x M10 on 120 mm PCD |
| Seal Type | Double-lip nitrile rubber |
Compatibility
This genuine ZF gearbox is engineered for direct fitment into the WG200 and WG92 transmission families. Based on its design and mounting interface, the 4660.133.002 is also compatible with the WG180 series and certain variants of the WG210 models. It is frequently used in municipal trucks, refuse vehicles, and medium-duty construction equipment. When installing this gearbox, ensure the 0501209818 RANGE SELECTOR is functioning correctly, as it governs the shift pattern that this gearbox executes. Additionally, the 4660101011 TRANSMISSION HOUSING and the 4660301018 HOUSING must be inspected for cracks or warping to ensure proper alignment and sealing of the gearbox assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4660198001 | PERIPHERALS | Hydraulic pump and valve assembly for clutch actuation |
| 0501209818 | RANGE SELECTOR | Controls high/low range shift pattern |
| 4660101011 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4660301018 | HOUSING | Rear cover housing for output shaft support |
| 0631306174 | CYLINDRICAL PIN | Alignment dowel for gearbox-to-housing positioning |
| 0769123894 | TYPE PLATE | Identification tag with transmission serial number |
| 4660221012 | SUCTION TUBE | Oil pick-up tube from pan to pump |
| 0634100317 | O-RING | Sealing ring for hydraulic line connections |
| 0636103273 | CAP SCREW | Fastener for gearbox cover retention |
| 0750100022 | SCREW PLUG | Drain or fill port plug for gearbox oil |
