Overview
The ZF 4644.026.192 6 WG 200 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This fully assembled gearbox integrates the clutch packs, planetary gear sets, and hydraulic control system into a single ready-to-install package. As a core component of the WG 200 Series, it delivers reliable power distribution and smooth directional shifts in wheel loaders, telehandlers, and industrial tractors. The SKU 4644.026.192 replaces worn or failed assemblies, restoring original ZF performance without the need for individual component rebuilding.
Symptoms of Failure
- Delayed or harsh engagement: When the transmission hesitates before moving or slams into gear, internal clutch pack wear or hydraulic pressure loss is likely. This often manifests as a “ZF transmission slipping under load” condition.
- External oil leaks at the bell housing: Seals and gaskets degrade over time, causing fluid to pool around the converter housing. A “ZF WG200 oil leak from front seal” is a common search query for this failure.
- Loss of power in higher gears: If the machine struggles to maintain speed in 4th, 5th, or 6th gear, the planetary assembly or torque converter may be failing. This symptom is frequently reported as “ZF powershift transmission won’t shift into high gear.”
- Unusual whining or grinding noises: Metallic sounds during operation indicate bearing or gear damage inside the assembly, often requiring immediate replacement of the complete unit.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4644.026.192 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 200 |
| Number of Speeds | 6 Forward / 3 Reverse |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 4644.026.192 |
Compatibility
This complete assembly is engineered for the ZF WG 200 series transmission family. It is directly compatible with WG 200 models used in loaders from manufacturers such as Volvo, Case, and JCB. While primarily designed for the WG 200, the 4644.026.192 may also be retrofitted into select WG 180 applications with adapter modifications. Always verify your transmission model tag before ordering. For proper installation, ensure the 4460165051 CONSOLE and 4460368311 CONSOLE are inspected and replaced if worn. Secure the assembly using a 0636011429 HEXAGON SCREW and a 0730100365 WASHER for each mounting point to prevent vibration loosening.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4460165051 | CONSOLE | Mounting bracket for transmission control linkage |
| 4460368311 | CONSOLE | Secondary support console for shift mechanism |
| 0636011429 | HEXAGON SCREW | M12 bolt for console and housing fastening |
| 0730100365 | WASHER | Flat washer for load distribution under screw head |
| 4644105418 | DISCONNECTION | Clutch disconnection valve assembly |
| 4644305041 | ADAPTER | Bell housing adapter plate for engine mounting |
| 4460068159 | AXLE DRIVE | Output drive flange for front axle connection |
| 4460168651 | INPUT FLANGE | Input shaft flange for torque converter coupling |
| 4460368318 | FLANGE | Output flange for rear driveline attachment |
| 4460368317 | DUST PROTECTION | Dust cover for input shaft seal area |
