ZF 4657.024.017 4 WG 190 Powershift Transmission Assembly | Complete Unit

Overview

This complete ZF 4657.024.017 4 WG 190 Powershift Transmission Assembly is a fully integrated unit designed for heavy-duty off-highway machinery. As the core power transfer module in the WG 190 series, this assembly manages torque distribution across four forward and reverse speeds, enabling smooth clutch engagement under load. The SKU 4657.024.017 represents the complete assembly, which integrates the main gear cluster, clutch packs, and hydraulic control circuits. It sits between the engine flywheel and the final drive, converting rotational power into controlled vehicle movement. For structural integrity, this unit relies on the 4657101033: TRANSMISSION HOUSING as its primary casing, while the 4657201027: HOUS.FRONT SECT and 4657201012: HOUSING REAR PART enclose the forward and rearward gear sections respectively.

Symptoms of Failure

• Delayed engagement or gear slipping under load: When the internal clutch packs or hydraulic seals degrade, operators notice hesitation when shifting from neutral to forward or reverse, particularly on inclines.
• External oil leaks at housing joints: Worn gaskets or cracked casings cause transmission fluid to seep from the mating surfaces of the front and rear sections, leading to low fluid levels and overheating.
• Abnormal whining or grinding noises during operation: Bearing wear or gear tooth damage inside the assembly produces metallic sounds that intensify with speed, indicating imminent internal failure.
• Erratic shift patterns or loss of power: A failing valve body or blocked oil feed passages cause the transmission to skip gears or fail to hold a selected ratio, reducing machine productivity.

Technical Specifications

Compatibility

This complete assembly is engineered specifically for the ZF WG 190 series of powershift transmissions. It is directly compatible with models including the WG 180, WG 190, and WG 200, which are commonly used in wheel loaders, forklifts, and telehandlers from manufacturers such as Liebherr, Caterpillar, and Volvo. The unit also fits select variants of the WG 160 and WG 210 series where the mounting flange and input shaft dimensions match. Always verify the bell housing pattern and torque converter size against your machine’s original equipment specifications before installation.

Related Components

Frequently Asked Questions

Q: Is the 4657.024.017 assembly a direct replacement for a failed WG 190 unit?
A: Yes, this is a complete, pre-assembled unit that replaces the entire transmission assembly. It includes all internal gears, clutches, and valve bodies, but does not include the torque converter or external oil cooler lines.

Q: What maintenance should be performed before installing this assembly?
A: We recommend replacing all seals, gaskets, and the 0631306792: CYLINDRICAL PIN to ensure proper alignment. Also inspect the 4657101033: TRANSMISSION HOUSING for cracks or wear before assembly.

Q: Can this unit be used in a ZF WG 180 transmission?
A: Yes, the 4 WG 190 assembly is mechanically compatible with WG 180 models, provided the torque converter housing and output flange match. Always cross-reference your original part number before ordering.