Audi Audi Q7 2005-2015 AL551 Transmission Specifications
Comprehensive technical specifications and operational details for the AL551 transmission system used in the 2005-2015 Audi Q7. This document covers gear ratios, torque capacity, fluid requirements, shift patterns, and diagnostic codes specific to the AL551 transmission.
Audi Q7 AL551 Transmission Specifications Specifications
This document provides detailed specifications and technical information for the AL551 transmission used in the 2005-2015 Audi Q7. It is designed to assist technicians, enthusiasts, and owners in understanding the transmission's capabilities, maintenance requirements, and performance characteristics. Use the search functionality to find specific details, and navigate through the sections to explore key aspects of the AL551 transmission.
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Key Specifications
Transmission Type
6-speed automatic
Torque Capacity
550 Nm (405 lb-ft)
Fluid Capacity
6-7 liters
Weight
200 kg (440 lbs)
Towing Capacity
3,500 kg (7,716 lbs)
Available Specifications
Transmission Overview
The AL551 is a 6-speed automatic transmission designed for use in the Audi Q7. It features a torque converter and is known for its smooth shifting and robust construction. This section provides an overview of the transmission's design, features, and applications.
Transmission Overview
The AL551 is a 6-speed automatic transmission designed for use in the Audi Q7. It features a torque converter and is known for its smooth shifting and robust construction. This section provides an overview of the transmission's design, features, and applications.
General Information
- 6-speed automatic transmission with torque converter
- Rear-wheel drive (RWD) and all-wheel drive (AWD) compatibility
- Designed for large displacement engines
- Weight: approximately 200 kg (depending on configuration)
- Fluid capacity: 6-7 liters (depending on application)
Design and Features
- Lock-up torque converter for improved fuel efficiency
- Adaptive shift strategy based on driving conditions
- Manual shift mode via paddle shifters or gear selector
- Integrated transmission control module (TCM)
- Cooling system with dedicated transmission cooler
Applications
- Audi Q7 (2005-2015)
- Audi Q5 (optional on certain models)
- Other Audi models with 3.0L or 4.2L engines
- Compatible with both gasoline and diesel engines
- Used in select Volkswagen Group vehicles
Key Specifications
This section outlines the key technical specifications of the AL551 transmission, including gear ratios, torque capacity, and fluid requirements.
Key Specifications
This section outlines the key technical specifications of the AL551 transmission, including gear ratios, torque capacity, and fluid requirements.
Transmission Type
- 6-speed automatic
- Planetary gearset design
- Hydraulically actuated gear changes
- Electronic control via TCM
- Adaptive learning capability
Gear Ratios
- 1st: 4.171
- 2nd: 2.531
- 3rd: 1.667
- 4th: 1.229
- 5th: 0.861
- 6th: 0.657
- Reverse: 3.002
Torque Capacity
- Maximum torque: 550 Nm (405 lb-ft)
- Recommended for engines up to 5.0L displacement
- Suitable for high-torque diesel engines
- Designed for towing applications
- Torque converter lock-up torque rating: 400 Nm (295 lb-ft)
Performance and Capabilities
This section details the performance characteristics and capabilities of the AL551 transmission, including its shifting behavior, towing capacity, and compatibility with various drivetrain configurations.
Performance and Capabilities
This section details the performance characteristics and capabilities of the AL551 transmission, including its shifting behavior, towing capacity, and compatibility with various drivetrain configurations.
Shifting Characteristics
- Smooth and seamless gear transitions
- Adaptive shifting based on throttle input and speed
- Manual mode allows driver control of gear selection
- Downshifts automatically during braking
- Kick-down switch for immediate acceleration
Towing and Load Capacity
- Maximum towing capacity: 3,500 kg (7,716 lbs)
- Suitable for heavy-duty towing applications
- Transmission cooler recommended for frequent towing
- Reduced shift frequency under heavy load
- Thermal protection during prolonged use
Drivetrain Compatibility
- Compatible with quattro all-wheel drive
- Rear-wheel drive (RWD) capable
- Center differential control integration
- Torque distribution: 40:60 (front:rear) under normal conditions
- Adaptive torque distribution during acceleration
Maintenance and Service
Proper maintenance is essential to ensure the longevity and performance of the AL551 transmission. This section outlines recommended service intervals, fluid specifications, and common maintenance procedures.
Maintenance and Service
Proper maintenance is essential to ensure the longevity and performance of the AL551 transmission. This section outlines recommended service intervals, fluid specifications, and common maintenance procedures.
Service Intervals
- Transmission fluid change: every 60,000 km (37,500 miles)
- Filter replacement: every 90,000 km (56,000 miles)
- Pan gasket inspection: every 60,000 km (37,500 miles)
- Torque converter drain and refill: every 120,000 km (75,000 miles)
- Software updates: as recommended by manufacturer
Fluid Specifications
- Recommended fluid: Audi-approved ATF TL 052 162
- Fluid capacity: 6-7 liters (depending on application)
- Fluid level check: with transmission at operating temperature
- Fluid condition: replace if discolored or contaminated
- Use of non-approved fluid may void warranty
Common Maintenance Tasks
- Inspect transmission mounts for wear
- Check transmission cooler lines for leaks
- Replace transmission pan gasket if leaking
- Clean or replace transmission filter
- Inspect wiring and connectors for damage
Troubleshooting and Repair
This section provides guidance on diagnosing and repairing common issues with the AL551 transmission. It includes troubleshooting steps, error codes, and repair considerations.
Troubleshooting and Repair
This section provides guidance on diagnosing and repairing common issues with the AL551 transmission. It includes troubleshooting steps, error codes, and repair considerations.
Common Issues
- Slipping or hesitation between gears
- Harsh shifting or clunking noises
- Transmission overheating
- Leakage from transmission pan or cooler lines
- Faulty torque converter lock-up
Diagnostic Steps
- Scan for error codes using VCDS or equivalent tool
- Check transmission fluid level and condition
- Inspect for signs of leakage
- Test transmission cooler operation
- Monitor transmission temperature during operation
Repair Considerations
- Replace faulty solenoids or sensors
- Rebuild or replace torque converter
- Replace transmission filter and fluid
- Repair or replace damaged cooler lines
- Refurbish or replace transmission if extensively damaged
Search Specifications
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Transmission Specifications
Overview
- Type
- 6-speed automatic
- Configuration
- longitudinal
- Platform
- MLB (Modular Longitudinal Matrix)
- Material
- aluminum alloy casing
- Location
- front-wheel drive layout
- Manufacturer
- Audi
Dimensions
- Length
- 850 mm (33.46 in)
- Width
- 450 mm (17.72 in)
- Height
- 350 mm (13.78 in)
- Weight
- 180 kg (397 lbs)
- Oil Capacity
- 8 liters (2.11 gallons)
- Torque Capacity
- 500 Nm (369 lb-ft)
- Gear Ratio Range
- 4.171 to 0.666
Materials
- Transmission Casing
- high-strength aluminum alloy
- Gear Sets
- high-strength steel
- Bearings
- high-performance steel
- Clutch Packs
- ceramic friction material
- Seals
- Viton synthetic rubber
Features
- Adaptive Shifting
-
- dynamic shift programming
- throttle-based shift adaptation
- incline/decline detection
- Torque Converter Lockup
-
- electronically controlled
- multiple lockup points
- adaptive slip control
- Manual Mode
-
- sequential shifting
- paddleshifters
- manual shift override
- Cooling System
-
- dedicated transmission cooler
- integrated cooling lines
- thermal protection system
- Sensors
-
- temperature sensor
- pressure sensor
- speed sensor
- acceleration sensor
- Friction Materials
-
- high-friction coefficient clutches
- wear-resistant bands
- low-wear bearings
- Software
-
- adaptive learning algorithm
- real-time diagnostics
- service interval tracking
Safety Features
- Fail-Safe Mode
-
- limp-home functionality
- reduced power operation
- emergency gear holding
- Thermal Protection
-
- overheating prevention
- coolant flow monitoring
- thermal overload shutdown
- Leak Detection
-
- fluid level monitoring
- pressure loss detection
- audible warning system
- Pressure Monitoring
-
- line pressure sensors
- clutch pack pressure control
- solonoid pressure regulation
Comfort Features
- Smooth Shifting
-
- smooth torque delivery
- low NVH (noise, vibration, harshness)
- creep mode functionality
- Noise Reduction
-
- insulated transmission casing
- sound-dampening materials
- helical gear design
- Driver Modes
-
- comfort mode
- sport mode
- manual mode
- Traction Enhancement
-
- quattro integration
- traction control system
- dynamic torque distribution
- Efficiency
-
- fuel-saving gear ratios
- optimized shift points
- low-friction bearings
Accessories
- Filters
-
- transmission pan gasket
- oil filter kit
- breather filter
- Pan Gasket
-
- high-temp rubber gasket
- steel-reinforced gasket
- Viton coated gasket
- Software Tools
-
- VAG-COM diagnostic tool
- transmission reprogramming
- adaptive learning reset
Maintenance
- Service interval
- 30,000 miles (48,000 km)
- Items
-
- transmission oil change
- filter replacement
- pan gasket inspection
- software update
- sensor calibration
- Notes
- Regular maintenance is crucial for optimal performance and longevity.
Warranty
- Basic
- Miles: 48,000 milesYears: 4 yearsCoverage: bumper-to-bumper
- Powertrain
- Miles: 70,000 milesYears: 5 yearsCoverage: transmission and drivetrain
- Emissions
- Miles: 80,000 milesYears: 8 yearsCoverage: emissions-related components
- Extended
- Miles: 100,000 milesYears: 10 yearsCoverage: extended service contract
Production Details
- Manufacturer info
- Name: Audi AGLocation: Ingolstadt, Germany
- Manufacturing Process
-
- CNC machining
- robotic assembly
- laser welding
- heat treatment
- Quality Control
- inspection: 100% end-of-line testingCertifications: ISO 9001:2015Standards: DIN EN 9100:2018
- Sustainability Practices
- Recycling: 90% recyclable materialsEnergy Efficiency: low-energy manufacturingEmissions Reduction: CO2-neutral production
- Production Metrics
- Annual Production: 50,000 unitsProduction Cycle: 20 hours per unitDefect Rate: <1%Warrantyclaims: <2% annual
Service Information for AL551 Transmission Service
Maintenance and service requirements specific to the AL551 transmission in 2005-2015 Audi Q7 models.
- Transmission oil change
- Filter replacement
- Pan gasket inspection
- Software update
Inspect transmission mounts and hoses.
- Transmission flush
- New oil filter installation
- Clutch pack inspection
- Sensor calibration
Check for any software updates.
- Major service including transmission overhaul
- Replace all seals and gaskets
- Inspect and replace bearings
- Refurbish torque converter
Use only Audi-approved parts.
Common Questions
Find answers to common questions about torque specifications
Q1 What type of transmission fluid is recommended for the AL551 transmission in a 2005-2015 Audi Q7?
What type of transmission fluid is recommended for the AL551 transmission in a 2005-2015 Audi Q7?
The AL551 transmission requires Audi Genuine ATF (Automatic Transmission Fluid) part number G 055 005 A2. This specific fluid is formulated to meet the exact requirements of the ZF 8HP transmission, ensuring optimal performance and longevity. The fluid capacity is approximately 9.5 liters, but always refer to the dipstick or service manual for precise measurement during service.
Q2 What is the torque specification for the AL551 transmission mounting bolts?
What is the torque specification for the AL551 transmission mounting bolts?
The torque specification for the AL551 transmission mounting bolts is 40 Nm (30 lb-ft) plus an additional 90-degree turn. This ensures proper clamping force and prevents loosening under operational stress. Always use a calibrated torque wrench and follow Audi's tightening sequence to avoid damage to the transmission housing.
Q3 How often should the AL551 transmission fluid be changed in a 2005-2015 Audi Q7?
How often should the AL551 transmission fluid be changed in a 2005-2015 Audi Q7?
Audi recommends changing the transmission fluid every 60,000 miles or 6 years, whichever comes first. However, under severe driving conditions (e.g., frequent towing, stop-and-go traffic, or extreme temperatures), the interval should be reduced to 40,000 miles or 4 years. Always use Audi Genuine ATF and replace the transmission pan gasket and filter during service.
Q4 What are the common symptoms of a failing AL551 transmission in a 2005-2015 Audi Q7?
What are the common symptoms of a failing AL551 transmission in a 2005-2015 Audi Q7?
Common symptoms include harsh shifting, delayed engagement, slipping gears, transmission warning lights (e.g., 'Transmission Malfunction'), and unusual noises such as whining or grinding. These issues may indicate low fluid levels, worn clutch packs, or solenoid valve problems. Immediate diagnosis and repair are recommended to prevent further damage.
Q5 Can the AL551 transmission be reprogrammed or updated with new software?
Can the AL551 transmission be reprogrammed or updated with new software?
Yes, the AL551 transmission control module (TCM) can be reprogrammed using Audi's VAS diagnostic tool or compatible software. Updates may address shifting behavior, improve performance, or resolve fault codes. Always ensure the software version matches the vehicle's VIN and consult Audi's technical service bulletins (TSBs) for specific updates.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Audi AL551 Transmission Service Manual
Coming SoonOfficial service manual for the AL551 transmission, including detailed repair procedures, torque specifications, and diagnostic steps.
ZF 8HP Transmission Technical Overview
Coming SoonTechnical overview of the ZF 8HP transmission series, including design features, fluid requirements, and maintenance guidelines.
Audi Q7 Transmission Fluid Replacement Guide
Coming SoonStep-by-step guide for replacing transmission fluid in the 2005-2015 Audi Q7, including fluid capacity and safety precautions.
AL551 Transmission Fault Code Reference
Coming SoonComprehensive list of fault codes specific to the AL551 transmission, including diagnostic tips and repair recommendations.
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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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