Overview
The ZF 4657.056.137 6 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the full gear train, clutch packs, and hydraulic control system into a single, ready-to-install package. As the core power transfer module in the WG 210 series, it replaces worn or failed transmissions in wheel loaders, dozers, and material handlers. The SKU 4657.056.137 ensures precise OEM fitment, eliminating guesswork during rebuilds. This unit works in concert with the TRANSMISSION HOUSING to contain lubrication and support planetary gears, while the HOUS.FRONT SECT and HOUSING REAR PART provide structural integrity for the torque converter and output shaft.
Symptoms of Failure
When the ZF 4657.056.137 assembly begins to fail, operators typically notice these specific issues:
- Delayed or harsh shifting – Worn clutch discs or degraded seals cause hesitation between forward and reverse gears, often accompanied by a jarring engagement.
- Torque converter shudder – A vibration or shudder during low-speed maneuvering indicates internal wear in the stator or turbine assembly.
- External oil leaks at housing joints – Weepage from the mating surfaces between the HOUSING REAR SECTION and main case signals gasket failure or housing cracks.
- Loss of power under load – Slipping in higher gears reduces tractive effort, forcing the engine to rev higher without proportional vehicle speed.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.056.137 |
| Series | WG 210 (6-speed powershift) |
| Dry Weight | Approx. 340 kg (750 lbs) |
| Housing Material | High-strength cast iron (GGG-40) |
| Overall Length | 620 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Torque Capacity | 2,100 Nm (1,550 lb-ft) |
| Clutch Type | Wet multi-disc, spring-applied/hydraulically released |
| OEM Reference | ZF 6 WG 210 |
Compatibility
This complete unit is engineered for the ZF WG 210 series, but it also fits select models in the WG 180 and WG 200 families when used with the correct adapters. Specific compatible transmissions include:
- ZF 6 WG 210 (direct fit)
- ZF 6 WG 200 (with front housing modification)
- ZF 6 WG 180 (requires output flange change)
- ZF 4 WG 210 (4-speed variant, same bellhousing pattern)
Always verify the TRANSMISSION HOUSING casting number before installation to confirm compatibility with your specific machine model.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural case enclosing gear sets |
| 4657201166 | HOUS.FRONT SECT | Front section supporting torque converter |
| 4657201170 | HOUSING REAR PART | Rear section housing output shaft bearings |
| 4657298102 | HOUSING REAR SECTION | Alternate rear cover for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for housing assembly |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Locks clutch piston in position |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | M10 bolt for valve body mounting |
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