Overview
The ZF 4657.056.038 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in replacement for heavy-duty off-highway applications. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control system into a single, pre-tested assembly. The SKU 4657.056.038 designates a factory-spec unit that sits at the core of the driveline, directly coupling to the engine bellhousing and output driveline. For a full rebuild, this assembly must be mated to a robust TRANSMISSION HOUSING to ensure structural integrity under high torque loads.
Symptoms of Failure
- Erratic gear engagement and slipping under load: When the internal clutch packs or valve body wear, the transmission may hesitate or slip when shifting from forward to reverse, especially on inclines.
- Hydraulic oil leaks around the bellhousing: Cracks or seal failures in the HOUS.FRONT SECT can cause visible drips of ATF, leading to low pressure and eventual gear train damage.
- Delayed or harsh shifting: A failing torque converter or worn spool valves produce a noticeable lag between throttle input and gear change, often accompanied by a metallic clunk.
- Overheating and burnt fluid smell: Internal debris from a failing HOUSING REAR PART can clog the oil cooler circuit, causing the transmission to run hot and degrade the fluid.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number / SKU | 4657.056.038 |
| Assembly Type | 6 WG 210 Powershift (Complete Unit) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| OEM Reference | ZF 4657.056.038 |
| Bolt Torque (housing) | 120 Nm (88 lb-ft) |
| Fluid Capacity | 22 liters (5.8 gal) |
Compatibility
This complete unit is engineered for the ZF WG 210 Series powershift transmissions. It is directly compatible with the following ZF models: WG 180, WG 200, WG 210, and WG 250 series used in wheel loaders, forklifts, and telehandlers. The assembly also fits select variants of the ZF 4WG-200 and 6WG-210 platforms. Always verify the bellhousing pattern and output flange configuration against your existing unit before installation. A CYLINDRICAL PIN is required to align the housing sections during reassembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101042 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201028 | HOUS.FRONT SECT | Front section housing torque converter |
| 4657201013 | HOUSING REAR PART | Rear section supporting output shaft |
| 0631306792 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for housing flanges |
| 4656301148 | FIXING PLATE | Locks bearing in position |
| 4657301034 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301035 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | High-strength bolt for valve body |
| 4656301048 | OIL FEED.HOUSG. | Distributes hydraulic fluid to clutch packs |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
