Overview
The ZF 4657.055.135 5 WG 210 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the main gear cluster, clutch packs, and hydraulic control elements into a single ready-to-install package. As a core component of the WG 210 Series, the SKU 4657.055.135 replaces the entire rotating assembly, eliminating the need for individual gear or shaft replacement. It sits directly within the main transmission casing, transferring torque from the torque converter to the output shaft. For proper installation, this assembly must be paired with a structurally sound 4657101082: TRANSMISSION HOUSING to ensure correct alignment and oil circulation.
Symptoms of Failure
When the ZF 4657.055.135 assembly begins to wear, operators will notice distinct performance degradation. Look for these specific failure indicators:
- Erratic gear engagement or slipping under load – Worn clutch discs within the assembly cause the transmission to hesitate or lose power during acceleration, especially in forward gears.
- Metallic grinding noise from the bell housing – Damaged planetary gears or bearings produce a distinct whining or grinding sound that intensifies with engine RPM.
- Delayed or no reverse engagement – Hydraulic pressure loss due to internal seal failure prevents the reverse clutch pack from locking, leaving the machine stuck in forward only.
- Contaminated transmission fluid with bronze particles – Shedding from synchronizer rings or thrust washers appears as glitter in the oil, indicating imminent assembly failure.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number / SKU | 4657.055.135 |
| Assembly Type | Complete Powershift Unit (5-Speed) |
| Dry Weight (approx.) | 68 kg (150 lbs) |
| Overall Length | 485 mm |
| Overall Width | 320 mm |
| Overall Height | 310 mm |
| Primary Material | Alloy Steel / Heat-Treated Gears |
| OEM Reference | ZF 5 WG 210 |
| Torque Capacity | 2100 Nm (max) |
Compatibility
This complete assembly is engineered for the ZF WG 210 Series transmissions. It is directly compatible with the following models and their derivatives: WG 180, WG 200, and WG 210. It also fits select variants of the WG 160 series when used with the appropriate 4657201166: HOUS.FRONT SECT and 4657201170: HOUSING REAR PART. For machines requiring a different rear mounting configuration, the 4657298102: HOUSING REAR SECTION may be substituted. Always verify the housing casting numbers before ordering.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101082 | TRANSMISSION HOUSING | Main structural casing for the assembly |
| 4657201166 | HOUS.FRONT SECT | Front section housing for input shaft support |
| 4657201170 | HOUSING REAR PART | Rear housing section for output bearing retention |
| 4657298102 | HOUSING REAR SECTION | Alternate rear housing for extended tail configurations |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing-to-assembly doweling |
| 0636100801 | CAP SCREW | M12 fastener for securing the front housing |
| 4656301148 | FIXING PLATE | Retaining plate for clutch pack preload |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit (outer) |
| 4657301033 | SCREEN SHEET | Fine mesh filter for hydraulic circuit (inner) |
| 0636100803 | CAP SCREW | M10 fastener for rear housing attachment |
