Audi Audi TT 1998-2006

Audi Audi TT 1998-2006 Suspension Specifications

Comprehensive technical guide for the 1998-2006 Audi TT suspension system, including detailed specifications, maintenance procedures, and repair instructions.

Updated Oct 24, 2023

Overview Specifications

Comprehensive description of the suspension specifications for the 1998-2006 Audi TT, including key features, measurements, and technical details. This guide covers front and rear suspension systems, alignment specifications, and component-specific details.

How to Use

Use the search function to locate specific suspension components or measurements by entering keywords such as 'front strut', 'rear axle', or 'alignment angles'.

Navigate through the documentation using the table of contents or section headers. Each section is organized by suspension type and component, with subsections detailing specific measurements and technical data.

Key Specifications

Front Spring Rate

22.5 N/mm

Rear Spring Rate

18.5 N/mm

Front Camber Angle

-0.5° to -1.0°

Rear Camber Angle

-1.5° to -2.0°

Anti-Roll Bar Diameter

18 mm (rear)

Available Specifications

Front Suspension

Details of the front suspension system, including MacPherson strut design, spring rates, and alignment specifications.

MacPherson Strut Assembly

Strut type: Gas-filled, monotube design
Spring rate: 22.5 N/mm (front)
Strut diameter: 50 mm
Bushing material: Rubber with steel reinforcement
Travel length: 120 mm

Alignment Specifications

Camber angle: -0.5° to -1.0°
Toe angle: 0.10° to 0.20° (toe-in)
Caster angle: 7.5° to 8.5°
Steering axis inclination: 12.5°

Note: Alignment settings may vary slightly depending on tire size and suspension package.

Rear Suspension

Technical details of the rear suspension system, including multi-link design, spring rates, and damping characteristics.

Multi-Link Suspension

Link type: Four-link independent suspension
Spring rate: 18.5 N/mm (rear)
Shock absorber type: Twin-tube gas-filled
Bushing material: Polyurethane with steel sleeves
Travel length: 110 mm

Alignment Specifications

Camber angle: -1.5° to -2.0°
Toe angle: 0.15° to 0.25° (toe-in)
Track width: 1525 mm
Anti-roll bar diameter: 18 mm

Note: Rear alignment settings are fixed and not adjustable without aftermarket components.

Suspension Components

Detailed specifications for key suspension components, including springs, shocks, and anti-roll bars.

Spring Specifications

Front spring free length: 380 mm
Rear spring free length: 420 mm
Wire diameter: 12.5 mm (front), 11.8 mm (rear)
Material: High-strength steel with corrosion-resistant coating

Shock Absorber Specifications

Front shock damping force: 2200 N at 0.3 m/s
Rear shock damping force: 1800 N at 0.3 m/s
Rebound damping: Adjustable (sport package only)
Compression damping: Fixed

Note: Sport package shocks feature increased damping rates for improved handling.

Wheel Alignment

Comprehensive guide to wheel alignment settings, including recommended values and adjustment procedures.

Alignment Settings

Front toe: 0.10° to 0.20° (toe-in)
Rear toe: 0.15° to 0.25° (toe-in)
Front camber: -0.5° to -1.0°
Rear camber: -1.5° to -2.0°

Adjustment Procedures

Front toe adjusted via tie rod ends
Rear camber adjusted via eccentric bolts (aftermarket only)
Caster angle fixed, not adjustable
Use alignment machine for precise measurements

Note: Always verify alignment after suspension modifications or component replacement.

Search Specifications

Search by specification name, value, or description

Component Specifications

Front Suspension

Type: MacPherson strut with lower control arm

Spring Rate: 22.5 N/mm

Shock ABSorber Type: Gas-filled telescopic

Strut Part Number: 8N0 412 031

Control Arm Part Number: 8N0 407 151

Bushing Material: Rubber with steel sleeve

Alignment Specs: Camber: -0.5° to +0.5°
Toe: 0.10° to 0.30°
Caster: 6.5° to 7.5°

Rear Suspension

Type: Multi-link independent suspension

Spring Rate: 18.5 N/mm

Shock ABSorber Type: Gas-filled telescopic

Trailing Arm Part Number: 8N0 505 251

Lateral Link Part Number: 8N0 505 311

Bushing Material: Rubber with steel sleeve

Alignment Specs: Camber: -1.5° to -0.5°
Toe: 0.10° to 0.30°

Springs

Front Spring Part Number: 8N0 411 105

Rear Spring Part Number: 8N0 511 115

Front Spring Free Length: 380 mm

Rear Spring Free Length: 420 mm

Spring Material: High-tensile steel

Spring Coatings: Electro-galvanized with epoxy coating

Shock ABSorbers

Front Shock Part Number: 8N0 413 031

Rear Shock Part Number: 8N0 513 031

Front Shock Stroke: 150 mm

Rear Shock Stroke: 140 mm

Damping Force Front: 1200 N at 0.3 m/s

Damping Force Rear: 1100 N at 0.3 m/s

Anti Roll Bars

Front Anti Roll Bar Diameter: 22 mm

Rear Anti Roll Bar Diameter: 18 mm

Front Anti Roll Bar Part Number: 8N0 411 305

Rear Anti Roll Bar Part Number: 8N0 511 405

Bushing Material: Polyurethane

Bushings And Mounts

Front Strut Mount Part Number: 8N0 412 331

Rear Shock Mount Part Number: 8N0 512 331

Control Arm Bushing Part Number: 8N0 407 181

Trailing Arm Bushing Part Number: 8N0 505 281

Material: Rubber with steel reinforcement

Wheel Alignment

Front Camber Range: -0.5° to +0.5°

Rear Camber Range: -1.5° to -0.5°

Front Toe Range: 0.10° to 0.30°

Rear Toe Range: 0.10° to 0.30°

Caster Range: 6.5° to 7.5°

Thrust Angle Tolerance: ±0.2°

Torque Specifications

Front Strut Mount Nuts: 50 Nm

Rear Shock Mount Nuts: 45 Nm

Control Arm Bolts: 90 Nm

Trailing Arm Bolts: 85 Nm

Anti Roll Bar Link Nuts: 40 Nm

Diagnostic Specifications

Shock ABSorber Leak Test: No visible fluid leakage

Bushing Wear Limit: No cracks or deformation exceeding 2 mm

Spring Sag Limit: Maximum 10 mm deviation from free length

Alignment Tolerance: Within ±0.2° of specified range

Maintenance Specifications

inspection Interval: Every 15,000 miles or 12 months

Lubrication Points

Control arm bushings
Anti-roll bar bushings
Strut mounts

Replacement intervals: Shock ABSorbers: Every 60,000 miles
Bushings: Every 50,000 miles
Springs: Inspect every 30,000 miles, replace as needed

Service Information Service

Detailed service requirements and schedules for the suspension system

15,000

Inspect shock absorbers for leaks
Check bushings for wear and cracks
Verify wheel alignment specifications

Replace worn components immediately to avoid further damage

30,000

Lubricate all suspension bushings
Inspect springs for sag or damage
Check torque on all suspension bolts

Use only Audi-approved lubricants and replacement parts

60,000

Replace shock absorbers
Inspect and replace bushings as needed
Perform full wheel alignment

Alignment should be performed after any suspension component replacement

Frequently Asked Questions

Find answers to common questions about torque specifications

What type of suspension system does the 1998-2006 Audi TT use?

The 1998-2006 Audi TT features a MacPherson strut front suspension and a multi-link rear suspension. The front suspension includes coil springs, gas-filled shock absorbers, and an anti-roll bar, while the rear suspension incorporates trailing arms, coil springs, and gas-filled shock absorbers for improved handling and stability.

What is the recommended ride height for the Audi TT suspension?

The factory ride height for the 1998-2006 Audi TT is approximately 140 mm (5.5 inches) at the front and 135 mm (5.3 inches) at the rear, measured from the wheel center to the fender lip. This measurement may vary slightly depending on the trim level and optional suspension packages.

How often should the suspension components be inspected?

Audi recommends inspecting the suspension components every 20,000 miles or 2 years, whichever comes first. Key components to check include the shock absorbers, struts, bushings, and anti-roll bar links for wear, leaks, or damage. Regular inspections are critical for maintaining optimal handling and safety.

Can I lower the suspension on my Audi TT?

Yes, the Audi TT suspension can be lowered using aftermarket coilovers or lowering springs. However, lowering the suspension may affect ride quality, alignment, and warranty coverage. It is recommended to consult with a professional technician and use Audi-approved components to ensure proper fitment and performance.

What is the torque specification for the front strut mount bolts?

The torque specification for the front strut mount bolts on the 1998-2006 Audi TT is 50 Nm (37 lb-ft) plus an additional 90-degree turn. Always use a calibrated torque wrench and follow Audi's tightening sequence to ensure proper installation and safety.

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 TT Suspension Service Manual

Coming Soon

Official Audi service manual detailing suspension system maintenance, repair procedures, and torque specifications for the 1998-2006 TT.

Suspension Alignment Guide

Coming Soon

Step-by-step guide to performing a proper wheel alignment on the Audi TT, including recommended settings and tools.

Genuine Audi Suspension Parts Catalog

Coming Soon

Catalog of OEM suspension components for the 1998-2006 Audi TT, including part numbers and compatibility information.

Suspension Troubleshooting Guide

Coming Soon

Comprehensive guide to diagnosing common suspension issues such as noise, vibration, and uneven tire wear on the Audi TT.

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