Overview
The ZF 4642.252.033 DISC CARRIER is a critical internal component engineered specifically for the WG150 series transmission. This OEM genuine part functions as the primary support structure for the clutch disc pack, ensuring precise alignment and torque transfer between planetary gear sets. Located within the main shaft assembly, the disc carrier maintains proper spacing and load distribution during gear engagement. When replacing this component, it is essential to inspect the adjacent 4642101108: TRANSMISSION HOUSING and 4642301208: TRANSMISSION HOUSING for wear, as housing distortion can accelerate carrier failure. The SKU 4642.252.033 is manufactured to ZF’s exacting tolerances for long service life in heavy-duty applications.
Symptoms of Failure
- Delayed or harsh shifting: A worn disc carrier causes uneven clutch pack pressure, leading to noticeable lag or jarring engagement between gears.
- Metallic grinding noise from transmission: As the carrier splines wear, metal-on-metal contact produces a distinct grinding sound during acceleration or deceleration.
- Intermittent loss of drive power: Slipping occurs when the carrier can no longer hold the clutch discs securely, resulting in power loss under load.
- Contaminated transmission fluid with metallic debris: Failing carriers shed fine metal particles into the oil, visible during routine fluid changes.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.252.033 |
| OEM Reference | ZF 4642.252.033 |
| Material | High-strength alloy steel, heat-treated |
| Weight | Approx. 3.2 kg (7.1 lbs) |
| Outer Diameter | 180 mm |
| Internal Spline Count | 24 |
| Surface Finish | Phosphate coated for corrosion resistance |
Compatibility
This disc carrier is designed primarily for the ZF WG150 series transmission. It is also compatible with the WG180 and WG200 models where the clutch pack configuration matches. Always verify the spline count and overall dimensions against your specific transmission. For proper installation, use the 0730365125: TYPE PLATE to confirm the exact transmission variant, and secure the assembly with the 0631311009: GROOVED STUD for correct torque retention.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses and supports gear train |
| 4642301208 | TRANSMISSION HOUSING | Alternate housing variant for WG150 |
| 0730365125 | TYPE PLATE | Identification plate for transmission model |
| 0631311009 | GROOVED STUD | Fastener for disc carrier retention |
| 4642301168 | SCREEN SHEET | Oil filter screen for debris protection |
| 4642301169 | SCREEN SHEET | Secondary oil filter screen |
| 0636100621 | HEXAGON SCREW | Mounting bolt for housing assembly |
| 0630361029 | SEALING CAP | Prevents fluid leakage from ports |
| 4642306254 | ADAPTER | Interface component for auxiliary systems |
| 0634303340 | O-RING | Seals fluid passages between components |

