Overview
The ZF 4642.054.038 4 WG 150 Powershift Transmission Assembly is a complete, factory-spec unit designed for heavy-duty off-highway applications. This assembly serves as the central power transfer module within the WG 150 series, integrating the torque converter, planetary gear sets, and hydraulic clutch packs into a single sealed housing. The SKU 4642.054.038 is a direct OEM replacement, ensuring precise fitment and original ZF performance. It sits as the core drivetrain component, receiving engine torque and distributing it through the output shaft to the final drive. When rebuilding a transmission, this complete unit is often paired with a TRANSMISSION HOUSING to secure the internal rotating assembly, or a TRANSMISSION HOUSING for specific model variants.
Symptoms of Failure
- Erratic gear engagement or slipping under load: Worn clutch packs or degraded seals inside the assembly cause the transmission to hesitate or lose torque when shifting, especially in higher gears.
- Internal hydraulic pressure loss: A failing unit will exhibit delayed engagement or a “flare” between shifts, indicating that the internal valve body or piston seals are compromised.
- Contaminated transmission fluid with metallic debris: As internal bearings or planetary gears wear, fine metal particles circulate through the oil, often visible on the dipstick or during a drain.
- External oil seepage from the bell housing area: Cracks in the main casing or failed gaskets allow fluid to leak, reducing lubrication and risking catastrophic failure.
Technical Specifications
| Specification | Value |
|---|---|
| OEM Part Number | 4642.054.038 |
| Assembly Type | Complete Powershift Unit (4 WG 150) |
| Dry Weight (approx.) | 185 kg (408 lbs) |
| Overall Length | 720 mm |
| Overall Width | 480 mm |
| Overall Height | 510 mm |
| Housing Material | High-strength cast iron (GGG-40) |
| Clutch Disc Material | Sintered bronze on steel |
| Max Input Torque | 1,500 Nm |
| OEM Reference | ZF 4 WG 150 |
Compatibility
This complete assembly is engineered specifically for the ZF WG 150 series. It is directly compatible with the 4 WG 150 model and can be retrofitted into earlier WG 150 variants with minor modifications. While the WG 180 and WG 200 series use a larger housing and different gear ratios, the internal shift logic and hydraulic architecture share common design principles. For verification, always cross-reference the TYPE PLATE on your existing unit, which lists the exact model designation. The assembly also mounts using GROOVED STUD fasteners for precise alignment.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101109 | TRANSMISSION HOUSING | Main structural casing for the gear train |
| 4642301205 | TRANSMISSION HOUSING | Alternative housing for specific WG 150 variants |
| 0730365125 | TYPE PLATE | Identification plate with model and serial number |
| 0631311009 | GROOVED STUD | Alignment and mounting stud for housing |
| 4642301168 | SCREEN SHEET | Oil filter screen for hydraulic circuit |
| 4642301169 | SCREEN SHEET | Secondary oil filter screen |
| 0636100621 | HEXAGON SCREW | Fastener for cover plate and housing |
| 4642301186 | SCREEN SHEET | Fine mesh screen for clutch lubrication |
| 4644106300 | SHIFT SYSTEM | Hydraulic valve body for gear selection |
| 4644306500 | COVER PLATE | Access cover for clutch pack inspection |
Authorized ZF Distributor
We are a certified supplier of genuine ZF components.
