Overview
The ZF 4651.006.016 6 WG 100(500) Powershift Transmission Assembly is a complete unit engineered for heavy-duty industrial and agricultural machinery. This assembly serves as the core power transfer module within the WG 100 series, integrating the torque converter, clutch packs, and planetary gear sets into a single, pre-assembled package. Designed for direct replacement, the SKU 4651.006.016 eliminates the need for piecemeal component sourcing, ensuring precise alignment and hydraulic integrity. It sits at the heart of the driveline, converting engine torque into controlled, multi-speed output for loaders, graders, and material handlers. For optimal sealing and structural support, this unit is installed alongside the 4651101007: TRANSMISSION HOUSING and the 4651301029: HOUSING, which provide the rigid casing and fluid channels required for sustained operation.
Symptoms of Failure
- Delayed engagement or gear slipping under load: When the 4651.006.016 assembly wears, internal clutch pack tolerances increase, causing hesitation when shifting from neutral to drive or slipping during heavy pulling.
- Hydraulic fluid leaks near the main casing: Deteriorated seals within the assembly lead to external oil seepage around the bell housing or output flange, often accompanied by a burnt smell from overheated fluid.
- Erratic or harsh shifting between forward and reverse: Worn valve body components or piston seals inside the unit cause pressure spikes, resulting in jarring gear changes that worsen as operating temperature rises.
- Loss of power in higher gears: Internal wear on planetary gear sets or torque converter stator failure reduces torque multiplication, making the machine unable to maintain speed on inclines.
Technical Specifications
| Parameter | Value |
|---|---|
| Product SKU | 4651.006.016 |
| Assembly Type | Complete Powershift Transmission Unit |
| Weight (approx.) | 185 kg (408 lbs) |
| Dimensions (L x W x H) | 620 mm x 480 mm x 420 mm |
| Housing Material | High-grade cast iron with aluminum clutch housing |
| OEM Reference | ZF 6 WG 100(500) |
| Fluid Capacity | 18.5 liters (4.9 gallons) |
Compatibility
This complete unit is specifically designed for the ZF WG 100 series transmissions, including the 6 WG 100 and 6 WG 100(500) variants. It is also compatible with the WG 180 and WG 200 series when used as a direct replacement for the main power transfer assembly, provided the 4651301024: HOUSING is matched to the vehicle’s PTO configuration. For sealing integrity during installation, always replace the 0634303928: O-RING to prevent cross-threading and fluid bypass. This assembly is commonly found in ZF drivetrains for Volvo, Case, and Caterpillar equipment requiring a 6-speed powershift.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4651101007 | TRANSMISSION HOUSING | Main structural casing for gear and shaft alignment |
| 4651301029 | HOUSING | Rear cover housing for output shaft support |
| 0634303928 | O-RING | Seal between housing and valve body |
| 4651301024 | HOUSING | Intermediate housing for clutch pack retention |
| 4651203002 | SCREEN SHEET | Fine mesh filter for hydraulic fluid debris |
| 4651303005 | SCREEN SHEET | Coarse screen for sump oil intake |
| 0636101032 | CAP SCREW | High-tensile bolt for housing fastening |
| 0630361028 | SEALING CAP | Threaded plug for test port sealing |
| 4475280060 | SCREW PLUG | Magnetic drain plug for ferrous debris |
| 0634303312 | O-RING | Seal for screw plug and cap screw interfaces |
