ZF 4657.024.168 4 WG 190 Powershift Transmission Assembly | Complete Unit

Overview

This ZF 4657.024.168 4 WG 190 Powershift Transmission Assembly is a complete, factory-engineered unit designed for heavy-duty off-highway applications. As the core power transfer module in the WG 190 series, this assembly integrates the torque converter, planetary gear sets, and clutch packs into a single, ready-to-install package. The SKU 4657.024.168 replaces worn or failed complete transmissions, restoring original ZF shift quality and load-handling capacity. It sits as the central driveline component between the engine and the final drive, managing all forward and reverse gear ratios under high torque loads.

Symptoms of Failure

• Erratic shifting or gear slippage under load: When the internal clutch packs or valve body wear, the transmission may hesitate or slip between gears, especially when moving heavy material.
• External oil leaks from housing seams: Cracks or warpage in the main casing allow hydraulic fluid to escape, often visible as drips around the bell housing or rear output flange.
• Delayed engagement or no movement in specific ranges: A failing complete unit may fail to engage forward or reverse gears, or exhibit a significant lag between shifting and actual motion.
• Overheating and burnt fluid odor: Internal wear generates excessive heat, causing the transmission fluid to darken and emit a burnt smell, often accompanied by reduced performance.

Technical Specifications

Compatibility

This complete unit is specifically engineered for the ZF WG 190 series. It is directly compatible with WG 180, WG 190, and WG 200 transmission models used in wheel loaders, telehandlers, and industrial tractors. The assembly also fits select variants of the ZF 4 WG 210 series where the mounting pattern and input spline match. Always verify the bell housing pattern and torque converter pilot diameter against your original unit before installation.

When replacing this complete assembly, you must also inspect the surrounding structural components. The 4657101078: TRANSMISSION HOUSING provides the main structural shell, while the 4657201166: HOUS.FRONT SECT and 4657201168: HOUSING REAR PART enclose the gear train. For units requiring additional rear support, the 4657298101: HOUSING REAR SECTION is often replaced concurrently to prevent misalignment.

Related Components

Frequently Asked Questions

Q: Can the ZF 4657.024.168 be installed without replacing the housing sections?
A: Yes, but only if the existing housings are free from cracks, warpage, or thread damage. For maximum reliability, we recommend replacing the TRANSMISSION HOUSING and HOUS.FRONT SECT simultaneously to ensure perfect alignment.

Q: What is the typical service life of this complete unit?
A: With proper maintenance and clean hydraulic fluid, the 4657.024.168 assembly typically lasts 8,000–12,000 operating hours in wheel loader applications. Harsh environments or frequent shock loading may reduce this interval.

Q: Does this unit include the torque converter?
A: Yes, the complete assembly includes the integrated torque converter and all internal clutches. You will still need to order external components like the SCREEN SHEET and CAP SCREW separately for a full rebuild kit.