Overview
The ZF 4657.055.129 5 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This SKU 4657.055.129 integrates the main gear cluster, clutch packs, and hydraulic valve body into a single ready-to-install assembly. It sits at the core of the driveline, transferring engine torque through five forward speeds and one reverse. For structural integrity, this unit mates directly with the 4657101082: TRANSMISSION HOUSING, which provides the main casing. The front section is sealed by the 4657201166: HOUS.FRONT SECT, while the rear is enclosed by both the 4657201170: HOUSING REAR PART and the 4657298102: HOUSING REAR SECTION to ensure leak-free operation under high load.
Symptoms of Failure
- Delayed or harsh gear engagement: When the complete unit wears, hydraulic pressure drops, causing a noticeable lag when shifting from neutral to drive or between forward gears.
- Oil leaks at housing seams: Cracks or warpage in the main assembly allow transmission fluid to seep past the HOUSING REAR PART and HOUSING REAR SECTION interfaces, leaving puddles under the vehicle.
- Gear slipping under load: Worn clutch packs inside the assembly cannot hold torque, causing the transmission to momentarily lose power when climbing or hauling.
- Unusual whining or grinding noises: Bearing fatigue within the 5 WG 210 produces a high-pitched sound that worsens as the unit approaches total failure.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.055.129 |
| Assembly Type | Complete Powershift Transmission Unit |
| Weight (approx.) | 185 kg (408 lbs) |
| Dimensions (L x W x H) | 720 mm x 480 mm x 410 mm |
| Housing Material | High-strength cast iron |
| OEM Reference | ZF 5 WG 210 |
| Number of Speeds | 5 Forward / 1 Reverse |
| Max Input Torque | 2100 Nm |
Compatibility
This complete assembly is engineered for the ZF WG 210 series, including the 5 WG 210 variant. It is also backward-compatible with earlier WG 180 and WG 200 models when used with the correct TRANSMISSION HOUSING and HOUS.FRONT SECT. Applications include wheel loaders, forklifts, and industrial tractors from manufacturers such as Liebherr, Volvo, and Caterpillar that utilize ZF drivetrains. Always verify the rear housing configuration—the HOUSING REAR PART and HOUSING REAR SECTION must match your chassis mounting points.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for the assembly |
| 4657201166 | HOUS.FRONT SECT | Front section housing the input shaft |
| 4657201170 | HOUSING REAR PART | Rear cover for output shaft support |
| 4657298102 | HOUSING REAR SECTION | Extended rear section for PTO mounting |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing doweling |
| 0636100801 | CAP SCREW | Fastener for housing flanges |
| 4656301148 | FIXING PLATE | Secures clutch pack retainers |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | High-tensile bolt for bell housing |
