Overview
The ZF 4644.036.211 6 WG 201 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control components into a single ready-to-install package. As the core power transfer module in the WG 201 series, it converts engine torque into precise, shiftable output across six forward speeds. The SKU 4644.036.211 is the definitive OEM reference for this complete unit, ensuring direct replacement without modification. It sits centrally within the driveline, connecting directly to the torque converter and output shaft, and is typically housed within a robust TRANSMISSION HOUSING to protect internal components from debris and shock loads.
Symptoms of Failure
When the ZF 4644.036.211 assembly begins to degrade, operators will notice distinct performance issues. Watch for these specific failure symptoms:
- Delayed or harsh gear engagement: A noticeable lag or jarring clunk when shifting between forward and reverse, often caused by worn clutch discs or degraded seals within the assembly.
- Intermittent gear slipping under load: The transmission momentarily loses power transfer during heavy pulling or climbing, indicated by a sudden RPM flare without corresponding speed increase.
- External oil seepage from the main housing joint: Hydraulic fluid leaking around the mating surface of the TRANSMISSION HOUSING, often accompanied by a burnt smell from overheated oil.
- Unusual whining or grinding noises: High-pitched sounds from the gear train area, particularly in lower gears, signaling bearing fatigue or gear tooth damage inside the assembly.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4644.036.211 |
| Assembly Type | Complete Powershift Unit (6 WG 201) |
| Number of Speeds | 6 Forward / 1 Reverse |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 410 mm |
| Primary Material | Cast Iron Housing / Hardened Steel Gears |
| OEM Reference | ZF 4644.036.211 |
| Related Housing Part | THREADED BUSH |
| Related Seal Part | SCREW PLUG |
Compatibility
This complete assembly is engineered for the ZF WG 201 series, but it also shares core architecture with several other ZF powershift models. It is directly compatible with the WG 180, WG 200, and WG 211 series transmissions used in agricultural tractors, wheel loaders, and telehandlers. The 4644.036.211 unit can be installed in machines originally equipped with ZF 6-speed powershift systems, including models from Case IH, New Holland, and Deutz-Fahr. Always verify the bellhousing pattern and output flange configuration against your existing unit before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Encloses and supports the gear train and clutch packs |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for specific output configurations |
| 4644301189 | THREADED BUSH | Provides wear-resistant thread for housing mounting bolts |
| 4475280043 | SCREW PLUG | Seals hydraulic ports and drain holes in the housing |
| 0634306198 | O-RING | Creates a leak-proof seal between mating surfaces |
| 0730365067 | TYPE PLATE | Identifies transmission model and serial number |
| 4644301161 | COVER PLATE | Protects internal components from external contamination |
| 0636100621 | HEXAGON SCREW | Secures the cover plate and housing sections |
| 0631610020 | SET SCREW | Adjusts clutch pack clearance or locks shift forks |
| 0501218540 | BREATHER | Equalizes internal pressure and prevents moisture ingress |
