Audi Audi S4 1997-2002

Audi Audi S4 1997-2002 AL450 Transmission Specifications

Comprehensive technical specifications for the AL450 transmission system used in the 1997-2002 Audi S4. This document covers gear ratios, torque capacity, fluid requirements, shift patterns, and maintenance procedures specific to the AL450 transmission.

Updated Oct 14, 2023

Overview Specifications

Comprehensive description of the al450-transmission specifications for the 1997-2002 Audi S4, including key features, measurements, and technical details

How to Use

Use the search function to locate specific al450-transmission specifications by entering keywords such as 'gear ratios', 'torque capacity', or 'fluid capacity'.

Navigate through the documentation sections using the table of contents or by scrolling through the major sections: General Specifications, Gear Ratios, Torque and Power Handling, and Maintenance Requirements.

Key Specifications

Transmission Type

6-speed manual

Maximum Torque

550 Nm (405 lb-ft)

Fluid Capacity

3.2 liters (3.4 quarts)

Weight

98 kg (216 lbs)

1st Gear Ratio

3.500:1

Available Specifications

General Specifications

This section covers the basic technical details and measurements of the al450-transmission.

Transmission Type and Configuration

6-speed manual transmission
Longitudinal mounting configuration
All-wheel drive (AWD) compatibility
Weight: 98 kg (216 lbs)
Fluid capacity: 3.2 liters (3.4 quarts)

Dimensions and Mounting

Overall length: 720 mm (28.3 in)
Width: 540 mm (21.3 in)
Height: 380 mm (15 in)
Bolt pattern: 8-bolt flange connection
Note: Ensure proper alignment during installation to avoid vibration issues

Note: Dimensions are approximate and may vary slightly based on manufacturing tolerances.

Gear Ratios

This section provides detailed gear ratios for the al450-transmission.

Forward Gear Ratios

1st gear: 3.500:1
2nd gear: 2.105:1
3rd gear: 1.429:1
4th gear: 1.088:1
5th gear: 0.885:1

Reverse Gear Ratio

Reverse gear: 3.333:1
Note: Reverse gear is synchronized for smoother engagement

Torque and Power Handling

This section outlines the torque and power handling capabilities of the al450-transmission.

Torque Capacity

Maximum torque capacity: 550 Nm (405 lb-ft)
Recommended torque limit for daily driving: 500 Nm (369 lb-ft)
Note: Exceeding torque limits may cause premature wear or failure

Power Handling

Maximum power handling: 331 kW (444 hp)
Designed for high-performance applications
Note: Ensure proper cooling for sustained high-power usage

Maintenance Requirements

This section covers maintenance intervals and fluid specifications for the al450-transmission.

Fluid Specifications

Recommended fluid: Audi Genuine MTF 75W-90
Fluid change interval: Every 60,000 km (37,282 mi)
Note: Use only approved fluids to ensure optimal performance

Inspection and Service

Inspect seals and gaskets every 30,000 km (18,641 mi)
Check for leaks during routine maintenance
Replace clutch components as needed
Note: Regular inspections can prevent costly repairs

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Transmission Specifications

General information

Transmission Type: 6-speed manual

Model Code: AL450

Manufacturer: Audi AG

Applicable Models

1997-2002 Audi S4 (B5)

Part Number: 01E 300 043 D

Weight: 85 kg (187.4 lbs)

Gear Ratios

1st Gear: 3.500:1

2nd Gear: 2.118:1

3rd Gear: 1.517:1

4th Gear: 1.156:1

5th Gear: 0.939:1

6th Gear: 0.778:1

Reverse Gear: 3.500:1

Final Drive Ratio: 4.111:1

Torque Capacity

Maximum input Torque: 400 Nm (295 lb-ft)

Recommended Torque Limit: 350 Nm (258 lb-ft)

Torque Rating Notes: Exceeding recommended limit may cause premature wear

Fluid Specifications

Fluid Type: Synthetic gear oil

Viscosity: 75W-90

Capacity: 2.6 liters (2.75 quarts)

Fluid Specification: Audi G 052 145 A2

Change interval: Every 60,000 miles or 5 years

Clutch Specifications

Clutch Type: Single dry disc

Clutch Diameter: 240 mm (9.45 in)

Clutch Material: Organic friction material

Clutch Actuation: Hydraulic

Clutch Fluid Type: DOT 4 brake fluid

Clutch Fluid Capacity: 0.5 liters (0.53 quarts)

Synchronizers

Type: Double-cone synchronizers (1st-4th gears)

Material: Brass alloy

Wear Tolerance: 0.2 mm (0.008 in) maximum

Replacement Part Number: 01E 311 295 C

Shifting Mechanism

Shift Linkage Type: Cable-operated

Shift Throw: 55 mm (2.17 in)

Shift Effort: 25-35 N (5.6-7.9 lbf)

Shift Gate Clearance: 1.5 mm (0.059 in) maximum

Differential Specifications

Type: Torsen T-2 limited-slip differential

Torque Split: 50:50 front-to-rear

Differential Fluid Capacity: 1.2 liters (1.27 quarts)

Differential Fluid Specification: Audi G 052 145 A2

Differential Part Number: 01E 409 010 A

Operational Limits

Maximum Rpm: 7,000 rpm

Maximum Operating Temperature: 120°C (248°F)

Minimum Operating Temperature: -40°C (-40°F)

Thermal Warning: Avoid prolonged operation above 100°C (212°F)

Diagnostic Specifications

Common Fault Codes

P0700
P0720
P0730

Diagnostic Tool: VAG-COM or equivalent

Diagnostic interface: OBD-II port

Diagnostic Notes: Check for clutch slippage, gear engagement issues, and fluid leaks

Service Information Service

Detailed service requirements and schedules for the AL450 transmission

30,000 miles

24 months

Inspect transmission fluid level
Check for leaks
Inspect clutch operation

Perform visual inspection and functional checks

60,000 miles

48 months

Replace transmission fluid
Inspect synchronizers
Check differential fluid level

Use only Audi-approved fluids

120,000 miles

96 months

Replace clutch assembly
Inspect shift linkage
Check differential for wear

Replace worn components as needed

Common Questions

Find answers to common questions about torque specifications

What type of transmission is the AL450 in the 1997-2002 Audi S4?

The AL450 is a 5-speed manual transmission used in the 1997-2002 Audi S4. It features a longitudinal layout and is designed to handle the torque output of the 2.7L twin-turbocharged V6 engine, which produces up to 250 lb-ft of torque.

What is the gear ratio configuration for the AL450 transmission?

The AL450 transmission has the following gear ratios: 1st gear - 3.500:1, 2nd gear - 1.889:1, 3rd gear - 1.231:1, 4th gear - 0.967:1, 5th gear - 0.806:1. The final drive ratio is 4.111:1.

What type of fluid should be used in the AL450 transmission?

The AL450 transmission requires Audi Genuine Gear Oil G 052 911 A2 or an equivalent synthetic gear oil meeting VW/Audi specification TL 521 82. The fluid capacity is approximately 2.6 liters (2.75 quarts).

How often should the transmission fluid be replaced in the AL450?

Audi recommends inspecting the transmission fluid every 40,000 miles and replacing it every 80,000 miles or sooner if signs of contamination or wear are detected. Always use the specified gear oil to ensure proper lubrication and performance.

What are common symptoms of a failing AL450 transmission?

Common symptoms include difficulty shifting gears, grinding noises during shifts, transmission fluid leaks, and excessive vibration. These issues may indicate worn synchronizers, damaged gears, or low fluid levels. Immediate inspection and repair are recommended.

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 S4 AL450 Transmission Service Manual

Coming Soon

Official service manual for the AL450 transmission, including disassembly, repair, and reassembly procedures.

Audi Gear Oil Specifications

Coming Soon

Detailed information on Audi-approved gear oils and their specifications for the AL450 transmission.

AL450 Transmission Troubleshooting Guide

Coming Soon

Step-by-step guide to diagnosing and resolving common issues with the AL450 transmission.

Audi S4 Owner's Forum

Coming Soon

Community-driven forum for Audi S4 owners to discuss maintenance, repairs, and performance upgrades.

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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.
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