Overview
The ZF 4143.301.039 HOUSING is a critical structural component designed for the HL 100 and HL 270 series transmissions. This OEM genuine part serves as the primary enclosure for the valve body and hydraulic control unit, ensuring precise oil flow and pressure regulation within the gearbox. The SKU 4143.301.039 is engineered to withstand high thermal loads and mechanical stress, maintaining the integrity of the transmission’s hydraulic circuit. When paired with a new 0501318136 GASKET, this housing creates a leak-proof seal that is essential for consistent shift quality and long-term durability.
Symptoms of Failure
- External oil leaks around the valve body area: A cracked or warped housing often results in fluid seepage, leading to low transmission fluid levels and eventual gear slippage.
- Erratic or delayed shifting: Internal fractures in the housing disrupt oil galleries, causing inconsistent hydraulic pressure and harsh engagement between gears.
- Contaminated transmission fluid: Debris from a failing housing can enter the oil circuit, accelerating wear on internal components and reducing overall efficiency.
- Overheating during operation: A compromised housing restricts proper oil circulation, causing the transmission to run hotter than normal and triggering warning lights.
Technical Specifications
| Part Number | 4143.301.039 |
| Material | High-grade aluminum alloy (die-cast) |
| Weight | 2.85 kg (6.28 lbs) |
| Dimensions (L x W x H) | 320 mm x 180 mm x 95 mm |
| OEM Reference | ZF 4143.301.039 |
| Surface Treatment | Anodized corrosion protection |
Compatibility
This housing is specifically engineered for the HL 100 and HL 270 transmission series. It is also compatible with the following ZF models that share the same hydraulic architecture: WG180, WG200, 4WG200, and 5WG190. Always verify the casting number on your existing unit before installation. For a complete seal, we recommend replacing the 0636101084 CAP SCREW and 0750108044 PLUG during assembly to prevent future leaks.
Related Components
| Part Number | Name | Function |
|---|---|---|
| 4143101016 | HOUSING | Secondary housing for auxiliary valve body |
| 0501318136 | GASKET | Seals the housing mating surface |
| 0636101084 | CAP SCREW | Secures housing to transmission case |
| 0750108044 | PLUG | Closes hydraulic test ports |
| 0636302014 | SCREW PLUG | Threaded plug for oil passages |
| 0634801057 | SEALING RING | Prevents fluid bypass at joints |
| 0730365092 | TYPE PLATE | Identification label for transmission |
| 4143201019 | VALVE INSERT | Regulates hydraulic pressure |
| 0634306198 | O-RING | Seals valve insert bore |
| 0634314427 | O-RING | Seals plug and cap screw interfaces |
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