Overview
This genuine ZF 4657.066.011 6 WG 211 Powershift Transmission Assembly represents a complete, drop-in replacement unit engineered for heavy-duty industrial drivelines. Designed as the central power distribution hub within the WG 211 Series, this assembly integrates the torque converter, planetary gear sets, and hydraulic control system into a single, pre-assembled module. The SKU 4657.066.011 is specifically calibrated for applications requiring precise clutch modulation and high torque throughput in construction, mining, and agricultural machinery. As a complete unit, it eliminates the need for piecemeal component replacement, ensuring immediate operational integrity and reduced downtime.
Symptoms of Failure
When this ZF 4657.066.011 assembly begins to degrade, operators will notice distinct performance declines. Identifying these signs early can prevent catastrophic driveline damage.
- Erratic gear engagement or slipping under load: The transmission may hesitate or fail to hold a gear when climbing grades or pushing heavy material, often accompanied by a burning clutch odor.
- External hydraulic fluid seepage at main case seals: Oil leaks commonly appear around the PTO cover or input shaft area, leaving puddles of ATF under the chassis after shutdown.
- Delayed directional shift response: A noticeable lag (2-3 seconds) when switching from forward to reverse, indicating worn clutch pack seals or degraded valve body spools.
- High-frequency whining or grinding noise: A metallic sound emanating from the center housing during neutral idle suggests bearing fatigue or planetary gear scoring.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number / SKU | 4657.066.011 |
| Assembly Type | Complete Powershift Unit (6 WG 211) |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 725 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Primary Material | High-tensile cast iron housing, hardened steel gears |
| OEM Reference | ZF 4657.066.011 (OEM direct) |
| Torque Capacity (max) | 2,100 Nm (1,549 lb-ft) |
Compatibility
This complete assembly is purpose-built for the ZF WG 211 Series transmission family. While the 4657.066.011 SKU is a direct fit for the 6-speed WG 211 variant, it shares mounting interfaces and hydraulic circuit designs with the following ZF models:
- ZF WG 180 (4-speed variant, same bellhousing pattern)
- ZF WG 200 (5-speed variant, compatible torque converter bolt circle)
- ZF WG 211 (6-speed, primary application for this SKU)
- ZF WG 250 (8-speed, shares internal clutch pack dimensions)
Always verify the serial number on your existing transmission tag before installation. This unit is not backward-compatible with the older WG 120 or WG 150 series without significant adapter modifications.
