Overview
This ZF 4656.054.117 4 WG 160 Powershift Transmission Assembly is a complete, ready-to-install unit engineered for heavy-duty industrial and agricultural machinery. As the core hydraulic-mechanical assembly in the WG 160 series, it integrates the torque converter, planetary gear sets, and clutch packs into a single sealed system. The SKU 4656.054.117 represents the fully assembled transmission, designed to deliver smooth, uninterrupted power shifts under high load conditions. It sits directly between the engine flywheel housing and the final drive, converting engine torque into controlled forward and reverse motion. This assembly is often paired with the 4656101058 TRANSMISSION HOUSING to ensure proper alignment and sealing of the internal components.
Symptoms of Failure
- Erratic or delayed gear engagement: When the internal clutch packs or valve body wear, operators notice a hesitation of 2-3 seconds before the transmission engages forward or reverse, often accompanied by a harsh jolt.
- Hydraulic oil leaks near the bell housing: Worn seals or a cracked 4656201075 HOUS.FRONT SECT can cause ATF fluid to pool under the machine, leading to low pressure and eventual transmission failure.
- Loss of power under load: Slipping clutches inside the 4 WG 160 assembly prevent full torque transfer, causing the machine to lose speed or stall when climbing grades or pushing heavy material.
- Unusual whining or grinding noises: Damaged planetary gears or worn bearings produce a metallic grinding sound that intensifies during gear shifts, indicating imminent internal failure.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4656.054.117 |
| Assembly Type | Complete Powershift Transmission (4-speed) |
| Dry Weight | Approx. 285 kg (628 lbs) |
| Overall Length | 720 mm |
| Housing Material | High-grade cast iron (GGG-40) |
| OEM Reference | ZF 4 WG 160 |
| Max Input Torque | 1,600 Nm |
| Fluid Capacity | 22 liters (ATF Dexron III) |
Compatibility
This ZF 4656.054.117 assembly is specifically designed for the WG 160 transmission series. It is fully compatible with the following ZF models: WG 160, WG 180, and WG 200 (when used with appropriate adapter plates). It also fits select variants of the WG 150 and WG 220 series used in telehandlers, wheel loaders, and forklifts. For proper installation, ensure the 4656201079 HOUSING REAR PART and the 4656298051 HOUSING REAR SECTION are inspected for cracks or warping before assembly.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4656101058 | TRANSMISSION HOUSING | Main structural casing that encloses the gear train and oil sump. |
| 4656201075 | HOUS.FRONT SECT | Front section housing that supports the torque converter and input shaft. |
| 4656201079 | HOUSING REAR PART | Rear housing segment that contains the output shaft and parking brake mount. |
| 4656298051 | HOUSING REAR SECTION | Secondary rear section providing structural support for the PTO drive. |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing mating during assembly. |
| 4656301148 | FIXING PLATE | Locking plate that secures the clutch piston retaining ring. |
| 0636100817 | CAP SCREW | High-tensile bolt for fastening the valve body to the housing. |
| 4656301016 | SCREEN SHEET | Fine mesh filter for the main hydraulic suction line. |
| 4656301017 | SCREEN SHEET | Secondary filter screen for the lubrication circuit. |
| 0636100803 | CAP SCREW | M10 bolt used for securing the oil pan and filter cover. |
Frequently Asked Questions
Q: Can the ZF 4656.054.117 be rebuilt, or must it be replaced as a complete unit?
A: While individual components like clutch packs and seals are serviceable, this SKU is sold as a complete, pre-assembled unit to minimize downtime. For partial repairs, you will need the 4656201075 HOUS.FRONT SECT and associated gaskets.
Q: What is the typical lifespan of this 4 WG 160 assembly under normal operating conditions?
A: With proper maintenance (regular oil changes and filter replacements), this unit typically lasts 8,000 to 12,000 operating hours. Failure often begins with a worn 4656301016 SCREEN SHEET causing contamination.
Q: Does this transmission assembly include the torque converter?
A: Yes, the 4656.054.117 is a complete unit that includes the integrated torque converter, all planetary gears, and the hydraulic valve body. Only external components like the 4656101058 TRANSMISSION HOUSING and drive shafts must be sourced separately.
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