Audi Audi S4 1991-1994 Drivetrain Specifications
Detailed technical specifications and documentation for the drivetrain system of the 1991-1994 Audi S4, including engine, transmission, differential, and quattro system details.
Overview Specifications
Comprehensive description of the drivetrain specifications for the 1991-1994 Audi S4, including key features, measurements, and technical details
How to Use
Use the search function to locate specific drivetrain components or specifications by entering keywords such as 'transmission type', 'differential ratio', or 'driveshaft length'.
Navigate through the drivetrain documentation by selecting the desired section from the table of contents. Each section is organized into subsections for detailed technical information.
Key Specifications
Transmission Type
5-speed manual (01A)
Center Differential
Torsen T-1
Final Drive Ratio
4.11:1
Driveshaft Length
1,450 mm
Transfer Case Torque Capacity
400 Nm
Available Specifications
Transmission System
Detailed information about the transmission system, including type, gear ratios, and technical specifications
Transmission System
Detailed information about the transmission system, including type, gear ratios, and technical specifications
Transmission Type
- 5-speed manual transmission (01A type)
- All-wheel-drive (AWD) configuration
- Dual-mass flywheel for reduced vibration
- Hydraulic clutch system with 215 mm diameter clutch disc
Gear Ratios
- 1st gear: 3.50:1
- 2nd gear: 2.06:1
- 3rd gear: 1.37:1
- 4th gear: 1.03:1
- 5th gear: 0.84:1
Note: Gear ratios optimized for performance and fuel efficiency
Differential System
Technical details about the differential system, including type, ratios, and operational characteristics
Differential System
Technical details about the differential system, including type, ratios, and operational characteristics
Center Differential
- Torsen T-1 type center differential
- Default torque split: 50:50 front to rear
- Automatic torque distribution based on traction
- Locking capability for off-road or low-traction conditions
Rear Differential
- Open differential with 4.11:1 final drive ratio
- Housing material: cast aluminum
- Oil capacity: 1.2 liters (75W-90 gear oil)
- Sealed for life with no service intervals
Driveshaft and Axles
Specifications and details about the driveshaft and axle components, including materials and dimensions
Driveshaft and Axles
Specifications and details about the driveshaft and axle components, including materials and dimensions
Driveshaft
- Two-piece steel driveshaft with center support bearing
- Total length: 1,450 mm
- Diameter: 80 mm
- Balanced for high-speed operation
Front Axles
- CV joint type: constant velocity (Rzeppa)
- Shaft diameter: 26 mm
- Spline count: 28
- Boot material: heat-resistant rubber
Note: Front axles designed for high torque and durability
Transfer Case
Technical specifications and operational details of the transfer case system
Transfer Case
Technical specifications and operational details of the transfer case system
Transfer Case Type
- Mechanical transfer case with Torsen differential
- Torque capacity: 400 Nm
- Oil capacity: 1.5 liters (75W-90 gear oil)
- Weight: 18.5 kg
Operational Characteristics
- Automatic torque distribution based on wheel slip
- No electronic controls, purely mechanical operation
- Designed for high reliability and minimal maintenance
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Component Specifications
Engine
- Type
- Inline 5-cylinder, turbocharged
- Displacement
- 2226 cc
- Compression Ratio
- 9.3:1
- Max Power
- 227 hp @ 5900 rpm
- Max Torque
- 258 lb-ft @ 1950 rpm
- Fuel System
- Bosch KE-Jetronic fuel injection
- Turbocharger
- Type: KKK K24Boost Pressure: 0.8 bar (11.6 psi)Part Number: 034145703A
Transmission
- Type
- 5-speed manual
- Model
- Audi 01A
- Gear Ratios
- 1st: 3.50:12nd: 2.11:13rd: 1.43:14th: 1.03:15th: 0.84:1Reverse: 3.17:1
- Final Drive Ratio
- 4.11:1
- Part Number
- 012300101B
Clutch
- Type
- Single dry plate, diaphragm spring
- Diameter
- 240 mm
- Material
- Organic friction material
- Part Number
- 034141031B
- Torque Capacity
- 350 Nm
Transfer Case
- Type
- Viscous coupling
- Part Number
- 012409709A
- Fluid Capacity
- 0.8 liters
- Fluid Type
- G 052 145 A2
Differential
- Front
- Type: Open differentialRatio: 4.11:1Part Number: 012409709B
- Rear
- Type: Open differentialRatio: 4.11:1Part Number: 012409709C
Driveshafts
- Front
- Type: Constant velocity (CV) jointsPart Number: 012409709DTorque Capacity: 350 Nm
- Rear
- Type: Constant velocity (CV) jointsPart Number: 012409709ETorque Capacity: 350 Nm
Axles
- Front
- Type: Independent, double wishbonePart Number: 012409709FWheel Bearing Type: Tapered roller bearing
- Rear
- Type: Independent, double wishbonePart Number: 012409709GWheel Bearing Type: Tapered roller bearing
Propeller Shaft
- Type
- Two-piece, with center support bearing
- Part Number
- 012409709H
- Length
- 1200 mm
- Material
- Steel
Fluid Specifications
- Engine Oil
- Type: Synthetic 5W-40Capacity: 5.5 litersSpecification: VW 501 01
- Transmission Fluid
- Type: Synthetic 75W-90Capacity: 2.6 litersSpecification: G 052 145 A2
- Differential Fluid
- Type: Synthetic 75W-90Capacity: 1.2 litersSpecification: G 052 145 A2
Operational Limits
- Max Engine Rpm
- 6500 rpm
- Max Boost Pressure
- 1.0 bar (14.5 psi)
- Max Towing Capacity
- 1500 kg
- Max Axle Load
- Front: 1200 kgRear: 1100 kg
Service Information Service
Detailed service requirements and schedules
- Engine oil and filter change
- Inspect brake system
- Check tire pressure and condition
Use only specified synthetic oil
- Replace transmission fluid
- Inspect driveshafts and CV joints
- Check differential fluid level
Replace with OEM-specified fluids
- Replace timing belt and tensioner
- Inspect turbocharger and intercooler
- Check clutch wear
Timing belt replacement is critical to prevent engine damage
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What type of drivetrain does the 1991-1994 Audi S4 use?
What type of drivetrain does the 1991-1994 Audi S4 use?
The 1991-1994 Audi S4 features a permanent all-wheel-drive (AWD) system known as 'quattro.' It utilizes a Torsen (Torque-Sensing) center differential, which provides a default torque split of 50:50 between the front and rear axles. The system automatically adjusts torque distribution based on traction conditions.
Q2 What is the gear ratio of the 5-speed manual transmission in the Audi S4?
What is the gear ratio of the 5-speed manual transmission in the Audi S4?
The 5-speed manual transmission in the 1991-1994 Audi S4 has the following gear ratios: 1st gear - 3.50:1, 2nd gear - 2.06:1, 3rd gear - 1.37:1, 4th gear - 1.03:1, and 5th gear - 0.84:1. The final drive ratio is 4.11:1.
Q3 What type of differentials are used in the Audi S4 drivetrain?
What type of differentials are used in the Audi S4 drivetrain?
The Audi S4 uses a Torsen center differential for the AWD system, along with open differentials at the front and rear. The Torsen differential provides superior torque distribution and traction without the need for electronic intervention.
Q4 What is the maximum torque capacity of the drivetrain in the Audi S4?
What is the maximum torque capacity of the drivetrain in the Audi S4?
The drivetrain in the 1991-1994 Audi S4 is designed to handle up to 258 lb-ft of torque, which is the maximum torque output of the 2.2L inline-5 turbocharged engine. Exceeding this torque capacity may result in drivetrain damage.
Q5 How often should the drivetrain fluids be serviced in the Audi S4?
How often should the drivetrain fluids be serviced in the Audi S4?
Audi recommends servicing the drivetrain fluids every 30,000 miles or 3 years, whichever comes first. This includes the transmission fluid, transfer case fluid, and differential fluids. Use only Audi-approved fluids, such as G 052 145 A2 for the transmission and G 052 145 S2 for the differentials.
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 Drivetrain Service Manual
Coming SoonOfficial Audi service manual for the 1991-1994 S4 drivetrain, including detailed procedures for maintenance, repair, and troubleshooting.
Torsen Differential Technical Guide
Coming SoonA comprehensive guide explaining the operation, benefits, and maintenance of the Torsen center differential used in the Audi S4.
Audi S4 Drivetrain Fluid Specifications
Coming SoonDetailed specifications for all drivetrain fluids, including transmission, transfer case, and differential oils, with recommendations for Audi-approved products.
Audi S4 Drivetrain Torque Specifications
Coming SoonA complete list of torque specifications for all drivetrain components, including bolts, nuts, and fasteners, to ensure proper assembly and safety.
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Technical Information
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