Overview
The ZF 4644.033.013 3 WG 201 Powershift Transmission Assembly represents a complete, factory-grade unit engineered for heavy-duty off-highway applications. This fully assembled transmission integrates the main gear cluster, hydraulic control valve body, and clutch packs within a robust casing. As a direct replacement for the WG 201 series, the SKU 4644.033.013 ensures seamless integration with existing drivelines. This unit sits at the core of the powertrain, converting engine torque into controlled wheel or track motion through its powershift functionality. For a secure installation, the TRANSMISSION HOUSING (4644101160) provides the structural foundation, while the TRANSMISSION HOUSING (4644301323) offers an alternative casting variant for specific model years.
Symptoms of Failure
When the ZF 4644.033.013 assembly begins to degrade, operators typically notice distinct performance issues. Delayed or harsh gear engagement during shifts indicates worn clutch discs or degraded hydraulic seals. Persistent oil leaks around the bell housing or output flange often stem from compromised gaskets or a cracked housing. Unusual whining or grinding noises during acceleration point to bearing fatigue or gear tooth damage. Intermittent loss of drive under load suggests internal pressure loss or a failing torque converter lock-up clutch. Addressing these symptoms promptly prevents secondary damage to the THREADED BUSH (4644301189) and the SCREW PLUG (4475280043).
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4644.033.013 |
| Series | WG 201 (3-speed) |
| Transmission Type | Powershift, countershaft design |
| Dry Weight (approx.) | 285 kg (628 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | Cast iron (GGG-40) |
| Max Input Torque | 1,200 Nm |
| OEM Reference | ZF 3 WG 201 |
| Fluid Capacity | 18 L (ATF Dexron III) |
Compatibility
This complete unit is specifically designed for the ZF WG 201 series, which includes the WG180, WG200, and WG201 variants commonly found in telehandlers, wheel loaders, and forklifts. It is also compatible with select WG 211 and WG 161 models that share the same bell housing pattern and input shaft spline count. Always verify the transmission model plate before ordering. For additional sealing integrity, the O-RING (0634306198) should be replaced during installation, and the TYPE PLATE (0730365067) confirms the exact OEM configuration.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4644101160 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4644301323 | TRANSMISSION HOUSING | Alternate housing variant for specific builds |
| 4644301189 | THREADED BUSH | Wear-resistant insert for shift linkage |
| 4475280043 | SCREW PLUG | Seals hydraulic passages |
| 0634306198 | O-RING | Prevents fluid leaks at joints |
| 0730365067 | TYPE PLATE | Identification tag for model verification |
| 4644301161 | COVER PLATE | Protects internal components from debris |
| 0636100621 | HEXAGON SCREW | Fastens housing sections |
| 0631610020 | SET SCREW | Locks adjustment points |
| 0501218540 | BREATHER | Equalizes internal pressure |
