Overview
The ZF 4657.055.136 5 WG 210 Powershift Transmission Assembly | Complete Unit is a fully integrated, factory-spec replacement for heavy-duty driveline applications. This complete assembly serves as the core power transfer module within the WG 210 series, managing clutch engagement and gear ratio shifts under high torque loads. The SKU 4657.055.136 designates a complete unit that includes the main gear set, hydraulic valve body, and output shaft assembly. When rebuilding a WG 210 transmission, this unit integrates directly with the 4657101082: TRANSMISSION HOUSING to form the primary structural enclosure, while the 4657201166: HOUS.FRONT SECT and 4657201170: HOUSING REAR PART provide critical mounting points for the clutch packs and final drive components.
Symptoms of Failure
- Erratic gear engagement under load: When the complete unit wears, operators experience delayed or harsh shifting during acceleration, often accompanied by a grinding noise from the main shaft area.
- Hydraulic fluid contamination: Internal seal degradation within the assembly allows debris to circulate, causing the 4657298102: HOUSING REAR SECTION to accumulate metallic particles and leading to pressure loss.
- Torque converter shudder: A rhythmic vibration at low RPM indicates worn clutch discs inside the powershift unit, which can escalate to complete power loss if the assembly is not replaced.
- Oil leaks at the bell housing interface: Cracks in the main casing or gasket failures cause visible drips, often traced back to stress fractures near the mounting bolt holes.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4657.055.136 |
| Assembly Type | 5-Speed Powershift (Complete Unit) |
| Weight (approx.) | 185 kg (408 lbs) |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Bolt Torque Spec (Main Housing) | 120 Nm |
| Fluid Capacity (System) | 18.5 Liters |
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 211. The assembly also fits select variants of the WG 160 series when used with the appropriate adapter plate. Always verify the serial number against your existing unit, as the 4657101082: TRANSMISSION HOUSING and 4657201166: HOUS.FRONT SECT must match the spline count of your output shaft.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section housing clutch pack |
| 4657201170 | HOUSING REAR PART | Rear section supporting output shaft |
| 4657298102 | HOUSING REAR SECTION | Alternate rear housing variant |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | M12 bolt for housing fastening |
| 4656301148 | FIXING PLATE | Secures valve body to housing |
| 4657301032 | SCREEN SHEET | Fine mesh filter for oil circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter |
| 0636100803 | CAP SCREW | M10 bolt for cover plate |
