Overview
The ZF 4642.101.445 TRANSMISSION HOUSING is a critical structural component engineered specifically for the WG150 series. This OEM genuine part forms the rigid outer shell that encloses the gear train, torque converter, and hydraulic valve body, ensuring precise alignment of all internal rotating assemblies. As the primary load-bearing casing, the 4642.101.445 housing absorbs torsional stresses and maintains oil pressure integrity during high-torque operations. When replacing this housing, it is common to also inspect the 4642101108 TRANSMISSION HOUSING and the 4642301208 TRANSMISSION HOUSING for compatibility within the same assembly.
Symptoms of Failure
- Persistent oil seepage at mating flanges: A cracked or warped housing allows transmission fluid to escape, often visible as wet spots around the bell housing or rear seal area. This is a common “ZF transmission housing oil leak” issue.
- Gear engagement hesitation or slipping: Distortion in the housing bore can misalign shafts, causing delayed shifts or intermittent gear slip under load, especially in WG150 units.
- Unusual metallic grinding noises: When the housing loses structural rigidity, internal gears may contact the casing walls, producing a distinct grinding sound during acceleration or deceleration.
- Contaminated fluid from cracked webbing: Stress fractures in the housing’s internal webbing can introduce debris into the oil circuit, leading to valve body clogging and erratic shift patterns.
Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 4642.101.445 |
| Material | High-grade aluminum alloy (A356-T6) |
| Weight | 18.5 kg (40.8 lbs) |
| Overall Length | 620 mm |
| Overall Width | 410 mm |
| Overall Height | 385 mm |
| Bolt Hole Pattern | 12-point, M12 x 1.75 |
| OEM Reference | ZF 4642.101.445 |
| Surface Treatment | Clear anodized |
Compatibility
This housing is designed for the ZF WG150 series transmissions, commonly found in medium-duty trucks, buses, and off-highway equipment. It also fits select variants of the WG180 and WG200 models when used with the appropriate adapter kit. For precise fitment, verify the bell housing pattern matches your unit. The 0730365125 TYPE PLATE provides exact model identification, while the 0631311009 GROOVED STUD is required for secure mounting of the housing to the engine block.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4642101108 | TRANSMISSION HOUSING | Alternate housing variant for WG150 |
| 4642301208 | TRANSMISSION HOUSING | Extended-length housing for WG180 |
| 0730365125 | TYPE PLATE | Identification plate for model verification |
| 0631311009 | GROOVED STUD | Mounting stud for housing-to-engine |
| 4642301168 | SCREEN SHEET | Oil filter screen for sump |
| 4642301169 | SCREEN SHEET | Fine mesh screen for valve body |
| 0636100621 | HEXAGON SCREW | Fastener for housing cover |
| 0630361029 | SEALING CAP | Oil port seal cap |
| 4642306254 | ADAPTER | Bell housing adapter plate |
| 0634303340 | O-RING | Housing-to-pump seal |
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