ZF 4656.056.107 6 WG 160 Powershift Transmission Assembly | Complete Unit

Overview

The ZF 4656.056.107 6 WG 160 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-assembled gearbox core designed for heavy-duty off-highway machinery. This complete unit serves as the primary power transfer module, converting engine torque into controlled hydraulic and mechanical output for wheel loaders, graders, and industrial vehicles. As a drop-in replacement for the WG 160 series, the SKU 4656.056.107 includes all internal clutch packs, planetary gearsets, and the main valve body. It mounts directly between the torque converter and the axle driveline, with the TRANSMISSION HOUSING providing the structural backbone for the entire assembly.

Symptoms of Failure

• Delayed engagement or gear slipping under load: Worn clutch discs or degraded seals inside the 4656.056.107 cause hesitation when shifting from neutral to forward or reverse, especially on inclines.
• External oil leaks at housing joints: Cracks or gasket failure in the HOUS.FRONT SECT or HOUSING REAR PART allow transmission fluid to escape, leading to low pressure and overheating.
• Unusual whining or grinding noises: Bearing wear or gear tooth damage within the complete unit produces metallic sounds that intensify during acceleration.
• Erratic shifting or loss of power: Internal hydraulic passage blockages or valve body wear cause the transmission to hunt for gears or fail to hold a selected range.

Technical Specifications

Compatibility

This complete unit is engineered specifically for the ZF WG 160 transmission series. It is also mechanically compatible with the WG 180 and WG 200 series when used with the appropriate HOUSING REAR SECTION adapter kit. Applications include ZF 6WG-160, 6WG-180, and 6WG-200 powershift transmissions found in Caterpillar, Volvo, and Case wheel loaders. Always verify bellhousing bolt patterns and output flange dimensions before installation.

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