Overview
The ZF 4642.251.013 DISC CARRIER is a critical internal component engineered for the WG150 series automatic transmission. This OEM genuine part functions as the primary structural hub that houses and aligns the clutch disc packs, ensuring precise torque transfer and smooth gear engagement. Positioned within the planetary gearset assembly, the disc carrier directly interfaces with the 4642101108: TRANSMISSION HOUSING to maintain concentric rotation under heavy loads. The SKU 4642.251.013 is manufactured to ZF’s exacting tolerances, making it essential for restoring factory performance in commercial vehicle transmissions.
Symptoms of Failure
When the 4642.251.013 disc carrier wears out, operators may notice distinct drivability issues. Delayed or harsh shifting occurs as the carrier’s splines lose engagement with clutch discs, causing erratic pressure buildup. Transmission overheating often follows, since a worn carrier allows clutch pack slippage that generates excess friction. Metallic grinding noises from the bell housing indicate the carrier’s bearing surfaces have degraded, potentially damaging the 4642301208: TRANSMISSION HOUSING. Intermittent loss of drive in forward gears is a common long-tail search query linked to this part, especially in WG150 units with high mileage.
Technical Specifications
| Parameter | Specification |
|---|---|
| Part Number | 4642.251.013 |
| Material | High-strength alloy steel (induction hardened) |
| Outer Diameter | 180 mm (approx.) |
| Inner Spline Diameter | 45 mm |
| Weight | 2.8 kg |
| OEM Reference | ZF 4642.251.013 |
| Surface Treatment | Phosphate coating for corrosion resistance |
Compatibility
This disc carrier is specifically designed for the ZF WG150 transmission series. Based on its spline count and clutch pack configuration, it is also compatible with the WG180 and WG200 models when used in standard-duty applications. The part directly mates with the 0730365125: TYPE PLATE for correct identification and the 0631311009: GROOVED STUD for secure mounting. Always verify your transmission’s serial number against ZF’s parts catalog before installation.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Encloses and supports all internal gearset components |
| 4642301208 | TRANSMISSION HOUSING | Alternate housing variant for WG150 series |
| 0730365125 | TYPE PLATE | Identification plate for transmission model and specs |
| 0631311009 | GROOVED STUD | Secures disc carrier to planetary carrier assembly |
| 4642301168 | SCREEN SHEET | Filters transmission fluid to protect clutch packs |
| 4642301169 | SCREEN SHEET | Fine-mesh filter for high-flow oil circuits |
| 0636100621 | HEXAGON SCREW | Fastens housing and adapter components |
| 0630361029 | SEALING CAP | Prevents fluid leaks from unused ports |
| 4642306254 | ADAPTER | Converts housing interface for alternate bell housings |
| 0634303340 | O-RING | Seals fluid passages between carrier and housing |
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