Overview
This genuine ZF 4644.026.245 6 WG 200(555/3) Powershift Transmission Assembly represents a complete drop-in replacement unit for heavy-duty industrial drivetrains. Designed as a fully assembled powershift transmission, this component integrates the torque converter, clutch packs, and planetary gear sets into a single, pre-tested module. The SKU 4644.026.245 sits at the core of the WG 200 series, managing power distribution from the engine to the output shaft in wheel loaders, forklifts, and construction machinery. As a complete unit, it eliminates the need for partial rebuilds, ensuring immediate operational reliability for your equipment.
Symptoms of Failure
When the ZF 4644.026.245 transmission assembly begins to degrade, operators typically notice distinct performance issues. Watch for these specific failure indicators:
- Delayed engagement or gear slipping under load: The transmission hesitates before moving forward or reverse, or it slips out of gear when climbing inclines or carrying heavy loads.
- Internal oil leaks around the bell housing or output flange: Visible hydraulic fluid pooling beneath the transmission, often accompanied by a burnt smell from overheated clutch material.
- Erratic shifting or harsh engagement: Sudden, jarring shifts between forward and reverse gears, indicating worn clutch packs or valve body issues within the assembly.
- Overheating during normal operation: The transmission temperature gauge rises above 120°C (248°F) during routine cycles, suggesting internal friction from failing bearings or seals.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4644.026.245 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 200 (6 WG 200 variant) |
| Dry Weight (approx.) | 285 kg (628 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 560 mm |
| Housing Material | High-tensile cast iron (GGG-40) |
| OEM Reference | ZF 4644.026.245 / 6 WG 200(555/3) |
| Input Torque Capacity | 555 Nm (max) |
| Fluid Capacity | 12.5 liters (ZF TE-ML 03 spec) |
Compatibility
This ZF 4644.026.245 assembly is engineered specifically for the WG 200 series of powershift transmissions. It is a direct fit for the 6 WG 200(555/3) variant, commonly used in mid-range wheel loaders and telescopic handlers. While primarily designed for the WG 200 family, this unit shares mounting patterns and hydraulic interfaces with the WG 180 and WG 210 series in certain applications, though always verify bell housing alignment. Compatible equipment includes:
- ZF WG 200 (all sub-variants: 4 WG 200, 6 WG 200)
- ZF WG 180 (with adapter plate verification)
- ZF WG 210 (limited to specific OEM configurations)
- Aftermarket replacements for Volvo L70, Caterpillar 924, and JCB 435 models using ZF drivelines
