Overview
The ZF 4657.084.101 4 WG 230 Powershift Transmission Assembly is a complete, factory-matched unit designed for heavy-duty off-highway applications. This assembly integrates the torque converter, planetary gear sets, and hydraulic control system into a single, ready-to-install package. As the core power delivery module for the WG 230 series, it manages gear ratio changes under full load without interrupting power flow. The SKU 4657.084.101 replaces the need for individual component sourcing, ensuring correct clutch pack clearances and valve body calibration from the start. This unit sits directly between the engine flywheel housing and the final drive, with the TRANSMISSION HOUSING providing the structural backbone for the entire assembly.
Symptoms of Failure
- Delayed or harsh engagement when shifting from neutral to forward or reverse: Worn clutch discs or degraded sealing rings inside the 4 WG 230 assembly cause pressure loss, leading to a noticeable lag or a jarring “clunk” during engagement.
- Intermittent gear slippage under load: When the transmission loses hydraulic pressure due to internal wear, the unit will momentarily lose torque transfer, causing engine RPM to spike without a corresponding increase in vehicle speed.
- External oil leaks at the housing mating surfaces: Cracks or warpage in the HOUS.FRONT SECT or the HOUSING REAR PART allow transmission fluid to escape, often pooling around the bell housing or output flange area.
- Overheating and burnt fluid odor: Continuous clutch slip generates excessive heat, which breaks down the transmission fluid and produces a distinct acrid smell, often accompanied by dark, gritty oil on the dipstick.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4657.084.101 |
| Assembly Type | Complete Powershift Transmission |
| Series | WG 230 |
| Number of Speeds | 4 Forward / 4 Reverse |
| Dry Weight (approx.) | 385 kg (849 lbs) |
| Overall Length | 720 mm |
| Overall Width | 510 mm |
| Overall Height | 580 mm |
| Housing Material | High-Grade Cast Iron |
| OEM Reference | ZF 4 WG 230 |
| Max Input Torque | 2,300 Nm |
Compatibility
This complete assembly is engineered specifically for the ZF WG 230 series. It is directly compatible with all variants of the WG 230, including the 4 WG 230 and 6 WG 230 models. While the WG 180 and WG 200 series share similar hydraulic architecture, the 4657.084.101 is dimensionally unique to the 230 series due to its larger clutch packs and torque converter. For applications requiring a replacement HOUSING REAR PART, ensure it matches the 230 series bolt pattern. This unit is commonly found in ZF-built telehandlers, wheel loaders, and industrial tractors from manufacturers such as Liebherr, JCB, and Manitou.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101051 | TRANSMISSION HOUSING | Main structural casing for gear and shaft support |
| 4657201151 | HOUS.FRONT SECT | Front section housing the torque converter and pump drive |
| 4657201103 | HOUSING REAR PART | Rear casing enclosing output shaft and PTO drive |
| 4472239184 | HOUSING REAR PART | Alternate rear housing variant for specific gear ratios |
| 0631306816 | CYLINDRICAL PIN | Alignment dowel for precise housing positioning |
| 0636100801 | CAP SCREW | M12 fastener for securing housing sections |
| 4656301148 | FIXING PLATE | Locking plate for clutch piston retention |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit protection |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump return line |
| 0636100803 | CAP SCREW | M16 fastener for bell housing attachment |
