---
title: "Transmission Housing"
industry: "Motor Vehicle Manufacturing"
verification_protocol:
  urn: "URN:CNFX:ME:TRANSMISSION_HOUSING"
  data_integrity_hash: "415d34e4cfd3eb1e17eec9dc9649d035"
  source_authority: "https://cnfx.com"
  strict_mode: true
source_identity:
  provider: "CNFX Industrial Knowledge Graph"
  index_version: "2026.Q1-Universal"
  authority_id: "URN:CNFX:ME:TRANSMISSION_HOUSING"
  data_source_uri: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/transmission-housing.md"
  official_resource_url: "https://cnfx.com/industry/motor-vehicle-manufacturing/product/transmission-housing"
  is_verified_logic: true
attributes:
  spec:
    status: "config-dependent"
    typical_range: "0-150°C temperature, 0-2.5 MPa internal pressure, 0-1000 N·m torque load"
    unit: "mm"
engineering_limits:
  max_safe_operating_point:
    value: 250
    unit: "MPa"
    consequence: "Von Mises stress exceeding A356-T6 aluminum yield strength (250 MPa) causes plastic deformation; differential thermal expansion (α=23.6×10⁻⁶/°C) exceeding 0.5 mm clearance induces binding; fatigue crack propagation at stress intensity factor K₁&gt;20 MPa√m"
fmea_matrix_quantitative:
  - node_1:
      trigger: "Thermal cycling between -40°C and 150°C at 5 cycles/hour"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Implement T6 heat treatment to increase fatigue strength to 90 MPa at 10⁷ cycles; reduce porosity to &lt;0.5% via vacuum-assisted casting"
  - node_2:
      trigger: "Misalignment exceeding 0.1 mm/mm between mounting surfaces"
      severity: 8
      occurrence: 3
      detection: 4
      mitigation_protocol: "Integrate machined alignment dowels with 0.01 mm tolerance; implement coordinate measuring machine verification at assembly"
bom_nodes:
  bearing-bore:
    type: "component"
    urn: "URN:CNFX:ME:BEARING_BORE"
    interface_type: "physical-logic-coupled"
  mounting-flange:
    type: "component"
    urn: "URN:CNFX:ME:MOUNTING_FLANGE"
    interface_type: "physical-logic-coupled"
  oil-sealing-surface:
    type: "component"
    urn: "URN:CNFX:ME:OIL_SEALING_SURFACE"
    interface_type: "physical-logic-coupled"
manufacturing_compliance:
  - standard: "ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS (GPS) - ISO CODE SYSTEM FOR TOLERANCES ON LINEAR SIZES)"
    scope: "Verified Engineering Specification"
  - standard: "ANSI/AGMA 2000-A88 (GEAR CLASSIFICATION AND INSPECTION HANDBOOK - TOLERANCES AND MEASURING METHODS FOR UNASSEMBLED SPUR AND HELICAL GEARS)"
    scope: "Verified Engineering Specification"
url: "https://cnfx.com/llms/industry/motor-vehicle-manufacturing/product/transmission-housing.md"
on_chain_sovereignty:
  contract_standard: "ERC-721-Industrial"
  metadata_hash: "51447366fd1453e61e8a9af024aa96f8ad1301c87ff6ec9288fc800ff031fe5f"
  royalty_logic: "IPFS-CID-REQUIRED"
  mint_status: "logic-verified-ready"
version: "3.3.4-EXTREME-SOVEREIGN-WEB3"
---

# Industrial Specification: Transmission Housing

## 1. Technical Definition
The protective outer casing that encloses and supports the internal components of a transmission system.

## 2. Engineering Reasoning & Causal Matrix
> **Operational Intelligence**: Designed for **0-150°C temperature, 0-2.5 MPa internal pressure, 0-1000 N·m torque load**. Failure boundary: **Material yield strength exceeded at 250 MPa von Mises stress, 180°C thermal deformation threshold, 3.0 MPa burst pressure**, Mechanism: **Von Mises stress exceeding A356-T6 aluminum yield strength (250 MPa) causes plastic deformation; differential thermal expansion (α=23.6×10⁻⁶/°C) exceeding 0.5 mm clearance induces binding; fatigue crack propagation at stress intensity factor K₁&gt;20 MPa√m**.

### 2.1 Analytical Physics Model
Governed by the **Frame Structural Deflection Analysis**:

> **Primary Equation**: $\delta = \frac{5 q L^4}{384 E I}$  
> **Engineering Impact**: Ensures structural stability for multi-stage machines.

| Symbol | Variable Definition | Localized Reference |
| :--- | :--- | :--- |
| q | Uniform Load | Engineering Constant |
| E | Elastic Modulus | Engineering Constant |
| I | Moment of Inertia | Engineering Constant |

### 2.2 FMEA (Failure Mode & Effects Analysis)
| Event Trigger | Severity | Failure Mode | Mitigation Strategy |
| :--- | :--- | :--- | :--- |
| Thermal cycling between -40°C and 150°C at 5 cycles/hour | 8 | Low-cycle fatigue crack initiation at casting porosity sites | Implement T6 heat treatment to increase fatigue strength to 90 MPa at 10⁷ cycles; reduce porosity to &lt;0.5% via vacuum-assisted casting |
| Misalignment exceeding 0.1 mm/mm between mounting surfaces | 8 | Bearing seat distortion causing premature bearing failure at 500 hours | Integrate machined alignment dowels with 0.01 mm tolerance; implement coordinate measuring machine verification at assembly |

## 3. Key Technical Parameters
| Parameter | Value | Unit | Status |
| :--- | :--- | :--- | :--- |
| spec | Config-dependent | mm | Verified |

## 4. System BOM & Knowledge Routing
### Core Components (Recursive Links)

### Industrial DNA Context (De-duplicated)
**Complementary Dependencies**: **CNC Machining Center**, **Coordinate Measuring Machine**, **Industrial Robotic Arm**  
**Downstream Applications**: Manual Transmission Assembly, Automatic Transmission Assembly, Dual-Clutch Transmission Assembly  

## 5. Engineering Risks & FAQ
- **Caution**: 
- **Caution**: 
- **Caution**: 

### Q: What materials are commonly used for transmission housings in motor vehicle manufacturing?
**A**: Transmission housings are typically made from aluminum alloy for lightweight applications, cast iron for durability and cost-effectiveness, or magnesium alloy for high-performance vehicles requiring maximum weight reduction.

### Q: What are the key components (BOM) of a transmission housing?
**A**: The main BOM components include the bearing bore (for shaft support), mounting flange (for attachment to the vehicle), and oil sealing surface (to prevent lubricant leakage and contamination).

### Q: How does transmission housing design affect vehicle performance?
**A**: Proper transmission housing design ensures protection of internal gears and components, maintains structural integrity under stress, provides effective heat dissipation, and prevents lubricant leaks—all critical for transmission longevity and vehicle reliability.

## 6. Manufacturing Compliance
- ISO 286-2:2010 (GEOMETRICAL PRODUCT SPECIFICATIONS (GPS) - ISO CODE SYSTEM FOR TOLERANCES ON LINEAR SIZES)
- ANSI/AGMA 2000-A88 (GEAR CLASSIFICATION AND INSPECTION HANDBOOK - TOLERANCES AND MEASURING METHODS FOR UNASSEMBLED SPUR AND HELICAL GEARS)

---
### 🛠️ Engineering Resource Access
🔗 **[Full Specification: Transmission Housing](https://cnfx.com/industry/motor-vehicle-manufacturing/product/transmission-housing)**

### 🌐 Knowledge Graph Topology
> **Node Status**: Verified Engineering Spec
> **Connectivity**: Linked to **3** standalone system nodes
> **Global Context**: Part of a 5,814 node industrial cluster within the CNFX Graph

> **Reference ID**: TRANSMISSION_HOUSING | **Authority**: CNFX-2026-ST-001 | **Fingerprint**: 18e1c6b5
