Overview
This genuine ZF 4642.056.004 6 WG 150 Powershift Transmission Assembly represents a complete drop-in replacement unit engineered for heavy-duty off-highway machinery. Designed as a fully assembled powershift gearbox, this unit integrates the torque converter, clutch packs, and planetary gear sets into a single, pre-tested assembly. The SKU 4642.056.004 sits at the core of the driveline, converting engine torque into controlled, multi-speed output for loaders, graders, and material handlers. As a complete unit, it eliminates the need for partial rebuilds, offering a direct exchange solution that restores original ZF performance specifications.
Symptoms of Failure
When the ZF 4642.056.004 assembly begins to degrade, operators will notice distinct operational issues. Watch for these specific failure indicators:
- Delayed or harsh directional shifts: A worn torque converter or failing clutch piston seals cause hesitation when shifting from forward to reverse, often accompanied by a jarring engagement.
- Internal oil leaks and pressure loss: Degraded seal rings or housing cracks lead to visible transmission fluid weeping from the bell housing or shift valve body, resulting in sluggish performance.
- Gear slipping under load: Worn clutch discs or a damaged planetary carrier allow the transmission to momentarily lose drive power when climbing grades or pushing heavy loads.
- Abnormal whining or grinding noises: Bearing fatigue or gear tooth pitting within the 6-speed planetary set produces a high-pitched whine that intensifies with engine RPM.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4642.056.004 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 150 |
| Number of Speeds | 6 Forward / 3 Reverse |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Housing Material | High-Grade Cast Iron |
| Input Torque Capacity | 1,500 Nm (1,106 lb-ft) |
| Overall Length | 720 mm |
| Mounting Configuration | SAE 3 Bell Housing |
| OEM Reference | ZF 6 WG 150 |
Compatibility
This complete unit is specifically engineered for the ZF WG 150 Series transmission family. Based on its design architecture and part number lineage, the 4642.056.004 assembly is compatible with the following ZF models and their derivatives:
- ZF WG 150 (primary fitment)
- ZF WG 180 (with adapter plate modifications)
- ZF WG 200 (limited compatibility for older generation units)
- ZF 6 WG 150 (direct replacement for early and late variants)
This assembly is commonly used in Volvo L90/L110 wheel loaders, Case 821/921 models, and Kawasaki 90ZV series machines. Always verify bell housing bolt pattern and torque converter pilot diameter before installation.
