Overview
The ZF 4644.036.052 6 WG 201 Powershift Transmission Assembly is a complete, factory-grade replacement unit designed for heavy-duty off-highway machinery. This assembly integrates the torque converter, clutch packs, and planetary gear sets into a single, pre-assembled housing. As the core driveline component in the WG 201 series, it manages power distribution from the engine to the driveline under high torque loads. The SKU 4644.036.052 corresponds to a fully dressed unit, eliminating the need for core exchange or partial rebuilds. It sits directly between the engine flywheel housing and the output yoke, serving as the primary power modulation and gear reduction system.
Symptoms of Failure
When the ZF 4644.036.052 assembly begins to degrade, operators will notice distinct operational faults. Identifying these early prevents catastrophic drivetrain damage.
- Erratic gear engagement or slipping under load: The transmission may hesitate or fail to hold a gear when climbing grades or pushing heavy loads. This often manifests as a sudden RPM flare without corresponding vehicle speed increase.
- Torque converter shudder at low speeds: A pronounced vibration or “chatter” during inching or low-speed maneuvering indicates worn clutch friction discs or a failing stator within the converter section.
- External oil leaks from the main housing or PTO cover: Seepage around the bell housing or output seal area points to degraded gaskets or seal rings, often accompanied by a burnt hydraulic fluid odor.
- Delayed directional shifts (forward/reverse lag): A 2-3 second delay when shifting from neutral to drive or reverse suggests internal valve body wear or low clutch pack clearance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4644.036.052 |
| Assembly Type | Complete Powershift Transmission Unit |
| Series | WG 201 |
| Overall Length (approx.) | 620 mm (24.4 in) |
| Dry Weight | 185 kg (408 lbs) |
| Housing Material | High-tensile cast iron (GGG-40) |
| Input Torque Capacity | 1,200 Nm (885 lb-ft) |
| OEM Reference | ZF 0501 202 052 |
| Fluid Capacity | 12.5 L (3.3 gal) of ZF TE-ML 03 |
Compatibility
This complete unit is engineered specifically for the ZF WG 201 transmission family. It is a direct bolt-in replacement for the following ZF model variants:
- WG 180 – Early production models with 6-speed forward configuration.
- WG 200 – Standard duty models used in telehandlers and wheel loaders.
- WG 201 – Heavy-duty variants with reinforced planetary carriers.
- WG 211 – High-torque derivative for mining and forestry equipment.
Always verify the bell housing pattern and output flange configuration against your original unit. This assembly is not compatible with the older WG 150 or WG 160 series without adapter kits.
