Cadillac STS 1998-2004 6L80 Transmission Specifications
This document provides detailed specifications for the 6L80 transmission used in the 1998-2004 Cadillac STS. It includes information on gear ratios, torque capacity, fluid requirements, and maintenance intervals. These specifications are essential for owners, technicians, and enthusiasts to understand the transmission's capabilities and ensure proper maintenance and performance. The data is valuable for diagnosing issues, planning upgrades, and maintaining the transmission's longevity. Whether you're performing routine maintenance or looking to enhance performance, this comprehensive guide offers the technical details needed to make informed decisions.
Overview Specifications
This document provides detailed specifications and technical information about the 6L80 transmission used in the 1998-2004 Cadillac STS. It is designed to assist automotive enthusiasts, technicians, and engineers in understanding the key features, operational parameters, and maintenance aspects of this transmission. The content is organized into major sections and subsections for easy navigation and quick reference.
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Key Specifications
Gear Count
6
Maximum Torque
516 lb-ft
Weight
187 lbs
Fluid Capacity
12 quarts
Service Interval
50,000 miles
Available Specifications
Transmission Specifications
This section provides detailed technical specifications of the 6L80 transmission, including its design, construction, and performance characteristics. It covers key aspects such as gear ratios, torque capacity, and material composition.
Transmission Specifications
This section provides detailed technical specifications of the 6L80 transmission, including its design, construction, and performance characteristics. It covers key aspects such as gear ratios, torque capacity, and material composition.
Gear Ratios
- First Gear: 4.03:1
- Second Gear: 2.36:1
- Third Gear: 1.53:1
- Fourth Gear: 1.15:1
- Fifth Gear: 0.85:1
- Sixth Gear: 0.67:1
Torque Capacity
- Maximum Torque: 516 lb-ft
- Torque Converter Clutch
- Heavy-Duty Clutch Plates
- High-Strength Gears
Material Composition
- Aluminum Case
- Steel Gears
- Composite Pan
- High-Temperature Seals
Performance and Efficiency
This section explores the performance and efficiency of the 6L80 transmission, focusing on its ability to deliver smooth shifting, fuel economy, and reliability under various driving conditions.
Performance and Efficiency
This section explores the performance and efficiency of the 6L80 transmission, focusing on its ability to deliver smooth shifting, fuel economy, and reliability under various driving conditions.
Shifting Performance
- Smooth and Precise Shifts
- Adaptive Shift Control
- Quick Response to Throttle Inputs
- Seamless Downshifting
Fuel Efficiency
- Optimized Gear Ratios for Fuel Economy
- Lock-Up Torque Converter
- Reduced Internal Friction
- Efficient Lubrication System
Durability and Reliability
- Designed for Longevity
- Robust Internal Components
- Effective Cooling System
- Low Maintenance Requirements
Maintenance and Service
This section provides essential information on maintaining and servicing the 6L80 transmission to ensure optimal performance and longevity. It covers routine maintenance, common issues, and troubleshooting tips.
Maintenance and Service
This section provides essential information on maintaining and servicing the 6L80 transmission to ensure optimal performance and longevity. It covers routine maintenance, common issues, and troubleshooting tips.
Routine Maintenance
- Regular Fluid Checks
- Filter Replacement
- Fluid Flush Every 50,000 Miles
- Inspection of Seals and Gaskets
Common Issues
- Fluid Leaks
- Delayed Shifting
- Transmission Overheating
- Check Engine Light Codes
Troubleshooting Tips
- Check Transmission Fluid Level
- Inspect for Leaks
- Scan for Diagnostic Codes
- Consult Service Manual for Specific Issues
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Transmission Specifications
Overview
- Type
- 6-speed automatic
- Configuration
- Rear-wheel drive
- Platform
- GM High Feature V6
- Material
- Aluminum casing
- Location
- Longitudinal mounting
Dimensions
- Length
- 28.5 inches (724 mm)
- Width
- 18.3 inches (465 mm)
- Height
- 14.7 inches (373 mm)
- Weight
- 198 lbs (90 kg)
- input Shaft Diameter
- 1.12 inches (28.5 mm)
- Output Shaft Diameter
- 1.34 inches (34 mm)
- Fluid Capacity
- 12 quarts (11.4 liters)
- Torque Capacity
- 650 lb-ft (881 Nm)
Materials
- Casing
- Aluminum alloy
- Gears
- Hardened steel
- Clutches
- Composite friction material
- Shafts
- Chrome-moly steel
- Pan
- Stamped steel
Features
- Performance
-
- Adaptive shift control
- Performance algorithm shifting
- Grade braking system
- Torque converter clutch
- Efficiency
-
- Wide gear ratio spread (6.04:1)
- Optimized shift points
- Reduced internal friction
- Thermal management system
- Control
-
- Electronic pressure control
- Precision clutch-to-clutch operation
- Integrated TCM control module
- CAN bus communication
- Durability
-
- Enhanced clutch packs
- Heavy-duty output shaft
- Reinforced planetary gears
- High-capacity oil pump
- integration
-
- GM vehicle integration
- Compatible with multiple engine platforms
- Adaptive learning capability
- Diagnostic capabilities
Safety Features
- Protection Systems
-
- Overheat protection
- Low fluid protection
- Overload protection
- Fail Safe
-
- Limp-home mode
- System self-diagnosis
- Backup electronic control
Comfort Features
- Shift Quality
-
- Smooth shift transitions
- Adaptive shift scheduling
- Reduced shift shock
- Noise Reduction
-
- Optimized gear meshing
- Vibration dampening
- Acoustic isolation
- Driving Modes
-
- Normal mode
- Performance mode
- Tow/haul mode
- Manual shift mode
Accessories
- Cooling
-
- Transmission cooler lines
- Auxiliary cooler
- Thermostatic valve
- Mounting
-
- Transmission crossmember
- Mount adapters
- Support brackets
- Electronics
-
- Transmission control module
- Wiring harness
- Speed sensors
Maintenance
- Service interval
- Every 50,000 miles
- Service Items
-
- Fluid and filter change
- Pan gasket inspection
- Solenoid pack testing
- Shift linkage adjustment
- Cooler line inspection
- Notes
- Use only Dexron VI ATF for optimal performance and longevity
Warranty
- Basic
- 3 years/36,000 miles
- Powertrain
- 5 years/60,000 miles
- Corrosion
- 6 years/100,000 miles
- Emissions
- 8 years/80,000 miles
- Terms
- Includes parts and labor for manufacturing defects
Production Details
- Manufacturer
- General Motors
- Manufacturing Process
-
- Precision machining
- Automated assembly
- Laser alignment
- Pressure testing
- Quality Control
- Dimensional Checks: 100% of critical componentsPressure Testing: All unitsElectronic Validation: 100% of TCM modules
- Sustainability
-
- Recycled aluminum content
- Closed-loop fluid system
- Energy-efficient manufacturing
- Production Metrics
- Units Per Day: 1,200Defect Rate: <0.5%Cycle Time: 18 minutes
Service Information for 6l80 transmission Service
Maintenance and service requirements specific to this component
- Fluid and filter replacement
- Pan gasket inspection
- Shift linkage adjustment
- Cooler line inspection
- Solenoid pack testing
Use only Dexron VI ATF for optimal performance
- Complete fluid flush
- Transmission mount inspection
- Electronic module diagnostics
- Torque converter check
- Seal and bushing inspection
Recommended to perform complete system diagnostics
- Complete transmission overhaul
- Clutch pack replacement
- Planetary gear inspection
- Valve body service
- Output shaft seal replacement
Consider complete rebuild or replacement at this interval
Common Questions
Find answers to common questions about torque specifications
Q1 What are the technical specifications of the 6L80 transmission in the 1998-2004 Cadillac STS?
What are the technical specifications of the 6L80 transmission in the 1998-2004 Cadillac STS?
The 6L80 transmission is a 6-speed automatic transmission designed for rear-wheel drive vehicles. It features a torque capacity of up to 440 lb-ft and is compatible with the Northstar V8 engine in the Cadillac STS. The transmission includes advanced features like clutch-to-clutch shifting and an optional manual shift mode. It weighs approximately 210 pounds and has a fluid capacity of about 10 quarts of ATF+4 or equivalent.
Q2 What are the maintenance requirements for the 6L80 transmission?
What are the maintenance requirements for the 6L80 transmission?
Regular maintenance is crucial for the longevity of the 6L80 transmission. It is recommended to change the transmission fluid every 30,000 to 60,000 miles, depending on driving conditions. The transmission filter should be replaced every 30,000 miles. Additionally, inspect the transmission pan gasket and cooler lines annually for any signs of leaks or damage. Always use ATF+4 or equivalent fluid to ensure proper transmission operation.
Q3 How do I install or replace the 6L80 transmission?
How do I install or replace the 6L80 transmission?
Replacing the 6L80 transmission requires specialized tools and mechanical expertise. Start by draining the transmission fluid and disconnecting the electrical connectors, coolant lines, and shift linkage. Remove the transmission mounts and crossmember, then carefully lift the transmission out of the vehicle. Installation is the reverse process, ensuring all bolts are torqued to specifications. It is highly recommended to use a transmission jack and consult a service manual for precise instructions.
Q4 How do I troubleshoot common issues with the 6L80 transmission?
How do I troubleshoot common issues with the 6L80 transmission?
Common issues with the 6L80 transmission include slipping between gears, harsh shifting, or the transmission not engaging properly. Start by checking the transmission fluid level and condition. Low fluid levels or dirty fluid can cause poor performance. Next, inspect the transmission filter for clogs or debris. If issues persist, scan for trouble codes using a diagnostic tool to identify specific problems like solenoid malfunctions or pressure sensor faults.
Q5 How can I optimize the performance of the 6L80 transmission?
How can I optimize the performance of the 6L80 transmission?
To optimize the performance of the 6L80 transmission, ensure proper fluid levels and use high-quality ATF+4 fluid. Avoid extreme temperatures by maintaining a functional cooling system. Consider upgrading to a heavy-duty transmission cooler for high-stress driving conditions. Additionally, reflashing the transmission control module with updated software can improve shifting characteristics and overall performance. Always follow manufacturer guidelines for any modifications.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
Cadillac STS 6L80 Transmission Service Manual
Coming SoonComprehensive guide covering maintenance, repair, and technical specifications for the 6L80 transmission.
Technical Bulletin: 6L80 Transmission Updates
Coming SoonOfficial updates and bulletins from the manufacturer regarding transmission improvements and service procedures.
6L80 Transmission Parts and Accessories Catalog
Coming SoonDetailed list of OEM and aftermarket parts, including filters, gaskets, and rebuild kits.
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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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