Acura MDX 2001-2006 B7XA Transmission Specifications
Detailed technical specifications and documentation for the B7XA automatic transmission system used in the 2001-2006 Acura MDX. This document covers transmission design, gear ratios, torque converter specifications, fluid capacity, shift points, and maintenance procedures specific to the B7XA transmission.
Overview Specifications
This document provides detailed specifications and information for the B7XA transmission found in the 2001-2006 Acura MDX. It is designed to assist technicians, enthusiasts, and owners in understanding, maintaining, and troubleshooting the transmission. Use the search functionality to quickly find specific information, and navigate through sections to explore detailed technical data.
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Key Specifications
Transmission Model
B7XA
Number of Gears
5
Torque Capacity
Up to 280 Nm
Fluid Capacity
Approx. 3.5 liters
Fluid Type
ATF DW-1
Available Specifications
General Specifications
This section provides an overview of the B7XA transmission, including its key features, performance capabilities, and technical specifications.
General Specifications
This section provides an overview of the B7XA transmission, including its key features, performance capabilities, and technical specifications.
Transmission Overview
- Model: B7XA
- Type: 5-speed automatic
- Number of gears: 5 forward, 1 reverse
- Torque capacity: Up to 280 Nm
- Fluid type: ATF DW-1
Performance Features
- Features include a lock-up torque converter for improved fuel efficiency
- Equipped with a sequential sport shift mode
- Adaptive shift control for varying driving conditions
- Grade logic control for uphill and downhill driving
Maintenance Requirements
This section outlines the recommended maintenance procedures and schedules for the B7XA transmission to ensure optimal performance and longevity.
Maintenance Requirements
This section outlines the recommended maintenance procedures and schedules for the B7XA transmission to ensure optimal performance and longevity.
Service Intervals
- Transmission fluid inspection: Every 15,000 miles
- Fluid change interval: Every 30,000 miles
- Transmission filter replacement: Every 30,000 miles
- Pan gasket inspection: Every 60,000 miles
Fluid Requirements
- Recommended fluid: ATF DW-1
- Fluid capacity: Approximately 3.5 liters
- Fluid change interval: Every 30,000 miles
- Filter type: Genuine Honda/Acura transmission filter
Troubleshooting Common Issues
This section provides guidance on diagnosing and addressing common issues with the B7XA transmission.
Troubleshooting Common Issues
This section provides guidance on diagnosing and addressing common issues with the B7XA transmission.
Symptoms of Transmission Problems
- Slipping or hesitation between gears
- Unusual noises during operation
- Delayed engagement from park to drive
- Warning lights on the dashboard
Diagnostic Tips
- Check transmission fluid level and condition
- Scan for trouble codes using an OBD-II scanner
- Inspect for fluid leaks around the pan and lines
- Test the transmission solenoids for proper function
Replacement and Upgrades
This section covers information related to replacing or upgrading the B7XA transmission, including parts and procedures.
Replacement and Upgrades
This section covers information related to replacing or upgrading the B7XA transmission, including parts and procedures.
Replacement Procedures
- Transmission replacement requires approximately 10-12 labor hours
- Recommended to use genuine Honda/Acura parts
- Special tools required: transmission jack and pan gasket tool
- Transfer case and cooler lines must be disconnected
Upgrade Options
- Performance torque converters available for improved acceleration
- Aftermarket transmission coolers for heavy-duty use
- Reinforced transmission pans for increased durability
- ECU tuning for optimized shift patterns
Search Specifications
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Transmission Specifications
Overview
- Type
- 5-speed automatic transmission
- Configuration
- Longitudinal
- Platform
- Honda B-platform
- Material
- Aluminum alloy case
- Location
- Front-engine, all-wheel drive layout
Dimensions
- Length
- 23.7 inches (602 mm)
- Width
- 17.3 inches (440 mm)
- Height
- 11.8 inches (300 mm)
- Weight
- 210 lbs (95 kg)
- Fluid Capacity
- 3.5 quarts (3.3 liters)
- Torque Converter Diameter
- 10.5 inches (267 mm)
- Gear Ratio Span
- 4.48 (first gear) to 0.48 (fifth gear)
Materials
- Transmission Case
- Aluminum alloy
- Gears
- High-strength steel
- Torque Converter
- Steel hub with carbon friction lining
- Bearings
- Steel-caged bearings
- Cooler Lines
- Aluminum alloy
Features
- Gear Ratios
-
- First: 4.48
- Second: 2.30
- Third: 1.47
- Fourth: 0.98
- Fifth: 0.48
- Reverse: 2.15
- Electronic Controls
-
- Transmission Control Module (TCM)
- Throttle Position Sensor (TPS)
- Vehicle Speed Sensor (VSS)
- Transmission Fluid Temperature Sensor (TFT)
- Solenoide Pack
- Torque Converter Features
-
- Lock-up clutch
- Torque converter damper
- Increased torque capacity
- Gearset Features
-
- Helical-cut gears
- Synchromesh design
- Overdrive gear for fuel efficiency
- Additional Features
-
- Manual shift mode
- Grade logic control
- Powertrain/engine integration
Safety Features
- Protective Mechanisms
-
- Overheating protection
- Pressure relief valves
- Electrical circuit protection
- Structural integrity
-
- Reinforced transmission case
- High-strength gear materials
- Robust mounting points
- Electronic Safeguards
-
- Redundant sensors
- Fail-safe mode
- Error code generation
Comfort Features
- Noise Reduction
-
- Sound-dampening materials
- Helical-cut gears for reduced noise
- Torque converter dampening
- Smoothoperation
-
- Adaptive shift control
- Smooth torque delivery
- Minimized shift shock
- Driving Comfort
-
- Manual shift capability
- Grade logic for inclines
- Optimized gear ratios
Accessories
- Filters
-
- Transmission fluid filter
- Torque converter filter
- Cooler line filter
- Replacement Kits
-
- Transmission pan gasket
- Drain plug washer
- Fluid filter kit
- Additional Accessories
-
- Transmission cooler
- Fluid additive package
- Service tool kit
Maintenance
- Service interval
- Every 30,000 miles (48,000 km) or as specified by the manufacturer
- Service Items
-
- Transmission fluid change
- Filter replacement
- Pan gasket inspection
- Torque converter check
- Solenoide pack inspection
- Maintenance Notes
- Regular fluid changes are critical for transmission longevity. Use Honda ATF DW-1 fluid only.
Warranty
- Basic Warranty
- Miles: 36000Years: 3Coverage: Bumper-to-bumper including transmission
- Powertrain Warranty
- Miles: 60000Years: 5Coverage: Drivetrain components including transmission
- Extended Warranty
- Miles: 120000Years: 10Coverage: Optional extended coverage for transmission
- Warranty Terms
- Warranty terms may vary based on region and usage conditions.
Production Details
- Manufacturer
- Honda Transmission Manufacturing
- Manufacturing Process
-
- Robotic welding
- Precision machining
- Heat treatment
- Quality inspection
- Quality Control
- inspection Points: Multiple stages including material, machining, and assemblyTesting Procedures: Functional testing of all units before shipmentCertification: ISO 9001 certified
- Sustainability Practices
-
- Recycling of materials
- Energy-efficient manufacturing
- Low-VOC paints
- Production Metrics
- Annual Output: Over 150,000 unitsDefect Rate: Less than 1%Cycle Time: Reduced by 15% through lean manufacturing
Service Information for b7xa transmission Service
Maintenance and service requirements specific to this component
- Transmission fluid change
- Filter replacement
- Inspect pan gasket
- Check torque converter
- Inspect solenoide pack
Use Honda ATF DW-1 fluid only. Check for any signs of leakage.
- Inspect transmission mounts
- Check cooler lines for damage
- Test transmission solenoids
- Update TCM software if necessary
- Inspect wiring harness
Special tools may be required for solenoid testing.
- Major transmission service
- Replace torque converter
- Overhaul valve body
- Check and replace bearing if needed
- Performance testing post-service
Critical to follow factory procedures to avoid damage.
Common Questions
Find answers to common questions about torque specifications
Q1 What is the recommended transmission fluid type for the b7xa-transmission in a 2001-2006 Acura MDX?
What is the recommended transmission fluid type for the b7xa-transmission in a 2001-2006 Acura MDX?
The b7xa-transmission requires Acura ATF-Z1 (Automatic Transmission Fluid) or an equivalent Honda/Acura-approved fluid. Using non-approved fluids may result in improper shifting or transmission damage. The fluid capacity is approximately 9.5 quarts (9 liters) when performing a full fluid exchange.
Q2 What is the torque specification for the b7xa-transmission drain plug?
What is the torque specification for the b7xa-transmission drain plug?
The torque specification for the b7xa-transmission drain plug is 36 lb-ft (49 Nm). Ensure the plug is properly tightened to prevent leaks, but avoid over-tightening to prevent thread damage.
Q3 How often should the transmission fluid be replaced in the b7xa-transmission?
How often should the transmission fluid be replaced in the b7xa-transmission?
Acura recommends replacing the transmission fluid every 30,000 to 60,000 miles (48,000 to 96,000 km) under normal driving conditions. Severe driving conditions, such as frequent towing or stop-and-go traffic, may require more frequent service intervals.
Q4 What are the symptoms of a failing b7xa-transmission?
What are the symptoms of a failing b7xa-transmission?
Common symptoms include delayed or harsh shifting, transmission slipping, unusual noises (e.g., whining or grinding), fluid leaks, and the illumination of the Check Engine or Transmission Warning light. If any of these symptoms occur, consult a certified technician immediately.
Q5 Can the b7xa-transmission be repaired, or does it require a full replacement?
Can the b7xa-transmission be repaired, or does it require a full replacement?
The b7xa-transmission can often be repaired, depending on the issue. Common repairs include replacing solenoids, valve bodies, or seals. However, severe internal damage may necessitate a full transmission replacement. Always consult a certified Acura technician for an accurate diagnosis.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Acura MDX Transmission Service Manual (2001-2006)
Coming SoonOfficial service manual for the b7xa-transmission, including detailed repair procedures, torque specifications, and diagnostic codes.
Transmission Fluid Replacement Guide
Coming SoonStep-by-step guide for replacing transmission fluid in the b7xa-transmission, including fluid type recommendations and safety precautions.
Common b7xa-Transmission Issues and Solutions
Coming SoonA comprehensive list of common issues with the b7xa-transmission, troubleshooting tips, and recommended repair procedures.
Acura Genuine Parts Catalog
Coming SoonOfficial catalog for Acura genuine transmission parts, including seals, gaskets, and solenoids specific to the b7xa-transmission.
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Technical Information
- All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
- Vehicle specifications and procedures may vary by model year, trim level, and region.
- Always follow the manufacturer's recommended procedures and safety precautions.
- Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
- If you're unsure about any procedure, consult a qualified professional mechanic.
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