ZF 4657.024.130 4 WG 190 Powershift Transmission Assembly | Complete Unit

Overview

This ZF 4657.024.130 4 WG 190 Powershift Transmission Assembly is a complete, factory-matched unit engineered for heavy-duty off-highway machinery. As the core power transfer module in the WG 190 series, this assembly integrates the torque converter, planetary gear sets, and hydraulic control system into a single, ready-to-install package. The SKU 4657.024.130 replaces worn or failed assemblies, restoring full forward and reverse shuttle functionality in loaders, dozers, and graders. It mounts directly to the engine bellhousing and mates with the driveline, with the 4657101078 TRANSMISSION HOUSING providing the structural backbone for the entire gear train.

Symptoms of Failure

• Delayed or harsh engagement: When the complete unit wears, operators experience a noticeable lag between shifting and gear engagement, often accompanied by a jarring clunk. This indicates internal clutch pack or seal degradation within the 4657.024.130 assembly.
• Transmission overheating under load: A failing unit cannot maintain proper hydraulic pressure, leading to excessive slip and fluid temperatures exceeding 120°C. This is a common long-tail search query for “ZF powershift overheating causes.”
• Oil leaks at housing joints: Cracks or warpage in the main structure force fluid past gaskets. Inspect the 4657201166 HOUS.FRONT SECT and 4657201168 HOUSING REAR PART for separation damage if puddles appear under the bellhousing.
• Loss of power in all forward gears: A complete unit failure results in the machine creeping or failing to move despite engine revving, often traced to a fractured 4657298101 HOUSING REAR SECTION that misaligns the output shaft.

Technical Specifications

Compatibility

This 4657.024.130 assembly is specifically engineered for the ZF WG 190 series. It is a direct fit for the 4 WG 190 model, and is mechanically interchangeable with the 4 WG 180 and 4 WG 200 variants when using the correct adapter plates. The unit also serves as a replacement for early 5 WG 190 configurations that share the same housing bolt pattern. Always verify the bellhousing alignment using the 4657101078 TRANSMISSION HOUSING dimensions before installation.

Related Components

Frequently Asked Questions

Q: Is the 4657.024.130 a direct bolt-in for a 4 WG 190?
A: Yes, this complete unit is factory-assembled and balanced for the 4 WG 190. It includes all internal clutches, seals, and the valve body. You must reuse your original 4657101078 TRANSMISSION HOUSING if it is undamaged, or order a new one separately.

Q: What causes a ZF 4 WG 190 to lose reverse gear?
A: Reverse gear loss typically stems from a failed clutch piston seal inside the complete unit. This can be confirmed by low pressure readings at the reverse port. Replacing the 4657.024.130 assembly resolves the issue entirely.

Q: Do I need to replace the screens when installing this assembly?
A: It is strongly recommended. Install new 4657301032 SCREEN SHEET and 4657301033 SCREEN SHEET to prevent debris from circulating through the new unit.