Overview
The ZF 4657.056.133 6 WG 210 Powershift Transmission Assembly | Complete Unit is a fully assembled, drop-in ready replacement for heavy-duty powershift applications. This complete unit integrates the main gear cluster, clutch packs, and hydraulic control system into a single, pre-tested assembly. As the core of the WG 210 Series, it manages torque distribution across six forward speeds, ensuring smooth directional shifts under load. The SKU 4657.056.133 is the direct OEM reference for this complete assembly, which is typically mounted between the engine bellhousing and the final drive. For a full rebuild, the 4657101080: TRANSMISSION HOUSING provides the structural foundation, while the 4657201167: HOUS.FRONT SECT seals the forward clutch area.
Symptoms of Failure
When the ZF 4657.056.133 assembly begins to fail, operators will notice distinct performance degradation. Watch for these specific failure modes:
- Delayed engagement or gear slipping under load: The internal clutch packs lose hydraulic pressure, causing hesitation when shifting from neutral to forward or reverse.
- External oil leaks at the main case seams: Worn seals between the 4657201171: HOUSING REAR PART and the main body allow ATF to weep, leading to low fluid levels.
- Grinding or whining noise in 3rd and 4th gear: Bearing wear inside the assembly creates metallic sounds, particularly during deceleration.
- Erratic shifting or transmission shudder: Contaminated valve body passages cause harsh engagement, often accompanied by a vibration through the driveline.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | 4657.056.133 |
| Assembly Type | Complete Powershift Unit (6 WG 210) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| OEM Reference | ZF 4657.056.133 |
| Max Input Torque | 2,100 Nm |
| Fluid Capacity | 14.5 Liters (ATF Dexron III) |
Compatibility
This complete assembly is engineered for the WG 210 Series powershift transmissions. It is directly compatible with the following ZF models and their derivatives:
- ZF WG 210 (all sub-variants, including 6 WG 210)
- ZF WG 180 (with adapter plate modifications)
- ZF WG 200 (mechanical interface identical)
- ZF WG 211 (late production models)
When installing, ensure the 4657298103: HOUSING REAR SECTION is correctly aligned to prevent oil gallery misalignment. The assembly also requires the use of 0631306816: CYLINDRICAL PIN for dowel alignment and 0636100801: CAP SCREW for securing the main housing bolts.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101080 | TRANSMISSION HOUSING | Main structural case for gear train |
| 4657201167 | HOUS.FRONT SECT | Front section housing clutch packs |
| 4657201171 | HOUSING REAR PART | Rear section covering output shaft |
| 4657298103 | HOUSING REAR SECTION | End cap for rear bearing support |
| 0631306816 | CYLINDRICAL PIN | Dowel pin for housing alignment |
| 0636100801 | CAP SCREW | M16 bolt for main housing |
| 4656301148 | FIXING PLATE | Retaining plate for valve body |
| 4657301034 | SCREEN SHEET | Fine mesh filter (oil suction) |
| 4657301035 | SCREEN SHEET | Coarse mesh filter (return line) |
| 0636100803 | CAP SCREW | M12 bolt for rear housing |
