Overview
This complete unit, the ZF 4644.036.019 6 WG 201 Powershift Transmission Assembly, is a fully assembled drop-in replacement designed for heavy-duty off-highway machinery. As a core component of the WG 201 series, this assembly integrates the torque converter, planetary gear sets, and hydraulic control system into a single, pre-tested package. The SKU 4644.036.019 specifically denotes a complete unit with updated clutch packs and sealing rings, ensuring immediate operational readiness upon installation. It serves as the primary power transfer interface between the engine and the driveline, managing load distribution across six forward speeds under high torque conditions.
Symptoms of Failure
When the ZF 4644.036.019 assembly begins to degrade, operators will notice distinct operational deficits. Common failure indicators include:
- Delayed engagement or clutch shudder during directional shifts, often caused by worn friction discs or degraded piston seals within the unit.
- External oil seepage at the PTO housing or bell housing interface, typically from hardened O-rings or cracked gasket surfaces on the main casing.
- Erratic gear holding under load, where the transmission slips out of a selected range during incline operation, pointing to accumulator valve wear.
- Elevated sump oil temperature (above 120°C) combined with metallic debris in the filter, indicating advanced planetary gear or bearing fatigue.
Technical Specifications
| Parameter | Value |
|---|---|
| Assembly Weight (Dry) | ~285 kg (628 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-tensile cast iron (GGG-40) |
| Input Torque Capacity | 1,200 Nm (885 lb-ft) |
| OEM Reference | ZF 4644.036.019 / 6 WG 201 |
| Fluid Capacity | 22 liters (ZF TE-ML 03 spec) |
Compatibility
This complete unit is engineered for the ZF WG 201 transmission family. It is directly compatible with the following models and their variants:
- ZF WG 201 (all sub-variants including 6 WG 201)
- ZF WG 180 (with adapter plate modification for certain output flanges)
- ZF WG 200 (direct fit for updated hydraulic valve bodies)
- ZF WG 211 (limited compatibility; verify bell housing bolt pattern)
This assembly is commonly specified for Kramer Allrad wheel loaders, Liebherr telescopic handlers, and Case IH agricultural tractors that originally utilized the WG 200 series. Always cross-reference the OEM part number against your equipment’s transmission tag before ordering.
