Overview
The ZF 4657.084.102 4 WG 230 Powershift Transmission Assembly | Complete Unit is a fully assembled, ready-to-install core component for heavy-duty powershift drivelines. This complete unit integrates the clutch pack, planetary gear sets, and hydraulic control circuits into a single sealed assembly, serving as the primary torque and speed conversion module within the WG 230 series. As a direct OEM replacement, the SKU 4657.084.102 ensures precise alignment with the transmission housing and output shaft, eliminating the need for field assembly of internal components. When paired with a compatible TRANSMISSION HOUSING, this unit restores full power flow and shift timing for loaders, graders, and industrial tractors.
Symptoms of Failure
- Delayed or harsh gear engagement: Worn internal clutches or seals cause a noticeable lag when shifting from neutral to forward or reverse, often accompanied by a jarring engagement.
- Erratic power loss under load: The transmission slips or loses torque during heavy pulling or climbing, indicating degraded friction plates or hydraulic pressure loss within the assembly.
- Contaminated transmission fluid with metallic debris: Fine metal particles in the oil signal bearing or gear wear inside the unit, leading to accelerated damage to the HOUS.FRONT SECT and adjacent components.
- Audible whining or grinding from the bell housing: Unusual noises during operation point to failing planetary bearings or misalignment with the HOUSING REAR PART.
Technical Specifications
| Parameter | Specification |
|---|---|
| OEM Part Number | 4657.084.102 |
| Assembly Type | Complete Powershift Unit (4 WG 230) |
| Dry Weight | Approx. 145 kg (320 lbs) |
| Overall Length | 520 mm |
| Housing Material | High-Grade Cast Iron (GGG-40) |
| Clutch Disc Material | Sintered Bronze on Steel |
| Max Input Torque | 2,300 Nm |
| OEM Reference | ZF 4 WG 230 |
| Related Fastener | CAP SCREW (M12 x 1.5) |
| Related Pin | CYLINDRICAL PIN |
Compatibility
This complete unit is engineered for the ZF WG 230 series powershift transmissions, commonly found in mid-size construction and agricultural machinery. It is directly compatible with models including the WG 180, WG 200, and WG 230 variants, provided the correct HOUSING REAR SECTION is used for alignment. The assembly also fits select ZF 4WG-230 derivatives used in telehandlers and wheel loaders. Always verify the housing configuration—units requiring a TRANSMISSION HOUSING or HOUS.FRONT SECT may need additional adaptation for older chassis.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4657101078 | TRANSMISSION HOUSING | Main structural casing for gear train |
| 4657201166 | HOUS.FRONT SECT | Front section supporting input shaft |
| 4657201168 | HOUSING REAR PART | Rear casing for output bearing support |
| 4657298101 | HOUSING REAR SECTION | Extended rear section for PTO mount |
| 0631306816 | CYLINDRICAL PIN | Alignment pin for housing assembly |
| 0636100801 | CAP SCREW | Fastener for clutch pack retention |
| 4656301148 | FIXING PLATE | Locks planetary gear carrier |
| 4657301032 | SCREEN SHEET | Fine mesh filter for hydraulic circuit |
| 4657301033 | SCREEN SHEET | Coarse mesh pre-filter for sump |
| 0636100803 | CAP SCREW | Fastener for rear housing section |
