2004 Acura TL 6 Speed Manual Transmission

The 2004 Acura TL 6-speed manual transmission is a precision-engineered gearbox designed for the third-generation Acura TL sports sedan. This transmission features close-ratio gearing, smooth shift action, helical-cut gears for reduced noise, and a durable construction capable of handling the 3.2L V6 engine's 260 horsepower. Below are key sections covering specifications, operation, maintenance, troubleshooting, and performance characteristics.

1. Transmission Specifications 2. Gear Ratios and Performance 3. Operation and Shifting Techniques 4. Maintenance Schedule 5. Fluid Requirements 6. Common Issues and Troubleshooting 7. Clutch System 8. Performance Upgrades 9. Warranty Information 10. Technical Service Bulletins

Transmission Specifications

The 6-speed manual transmission in the 2004 Acura TL features advanced engineering for optimal performance and durability.

Specification	Details
Transmission Type	6-speed manual, front-wheel drive
Case Material	Aluminum alloy
Gear Type	Helical cut (1-6), reverse (straight cut)
Synchros	Carbon-lined, multi-cone design
Final Drive Ratio	4.389:1
Weight	Approximately 98 lbs (dry)
Fluid Capacity	2.6 quarts (2.5 liters)
Fluid Type	Honda MTF or equivalent synthetic
Shift Linkage	Cable-operated
Manufacturer	Honda/Acura

Gear Ratios and Performance

Optimized gear ratios provide excellent acceleration and highway cruising capability.

1st Gear: 3.266:1 - Maximum acceleration from standstill
2nd Gear: 1.888:1 - Strong mid-range acceleration
3rd Gear: 1.321:1 - Optimal passing performance
4th Gear: 1.034:1 - Balanced performance and economy
5th Gear: 0.825:1 - Highway cruising with good response
6th Gear: 0.658:1 - Maximum fuel economy at speed
Reverse: 3.583:1 - Controlled reverse operation

Performance Data: 0-60 mph in approximately 6.0 seconds, top speed electronically limited to 130 mph.

Operation and Shifting Techniques

Proper shifting technique ensures smooth operation and extends transmission life.

Cold Operation: Allow transmission to warm up with gentle shifting for first few minutes
Shift Pattern: Standard H-pattern with reverse left and up
Rev-Matching: Recommended for smooth downshifts
Skip-Shifting: Possible due to wide torque band (e.g., 2nd to 4th gear)
High-RPM Shifting: Use firm, deliberate shifts above 5,000 RPM

WARNING! Do not force shifts or rest hand on shift lever during normal driving.

Maintenance Schedule

Fluid Change: Every 30,000 miles or 2 years
Clutch Fluid: Check every 15,000 miles, replace every 3 years
Shift Linkage: Inspect every 30,000 miles
Transmission Mounts: Check every 60,000 miles
Clutch System: Inspect every 15,000 miles
Drain Plug Torque: 36 ft-lbs (49 Nm)
Fill Plug Torque: 29 ft-lbs (39 Nm)

Fluid Requirements

Proper fluid selection is critical for transmission longevity and performance.

Recommended Fluids: Honda Manual Transmission Fluid (MTF), Acura MTF, or equivalent synthetic manual transmission fluid meeting Honda/Acura specifications.

Fluid Capacity: 2.6 quarts (2.5 liters) - ensure proper fill level at fill plug opening.

Change Procedure: Warm transmission, remove fill plug first, then drain plug. Refill until fluid runs out fill hole.

Common Issues and Troubleshooting

Address common transmission concerns with proper diagnosis and repair.

Symptom	Possible Cause	Corrective Action
Grinding in 2nd/3rd gear	Worn synchros or low fluid	Check fluid level; inspect synchros; replace if necessary
Difficulty shifting when cold	Old fluid or wrong type	Replace with proper Honda MTF
Notchy shifting	Worn shift linkage or bushings	Inspect and replace shift linkage components
Transmission noise	Bearing wear or gear damage	Professional diagnosis required
Fluid leaks	Seals or gaskets	Replace input shaft seal, output shaft seal, or side cover gasket

Clutch System

The clutch system works in conjunction with the 6-speed transmission for smooth power transfer.

Clutch Type: Single disc, diaphragm spring, hydraulic operation
Clutch Disc Diameter: 9.8 inches (250mm)
Fluid Type: DOT 3 or DOT 4 brake fluid
Master Cylinder: Integrated with clutch pedal assembly
Slave Cylinder: External, mounted on transmission case
Clutch Life: Typically 60,000-100,000 miles with proper use

CAUTION! Do not ride clutch pedal; replace fluid every 3 years to prevent corrosion.

Performance Upgrades

Enhance transmission performance with aftermarket upgrades.

Short Shifter Kits: Reduce shift throw by 30-40%
Aftermarket Fluids: Royal Purple Synchromax, Red Line MTL
Solid Shifter Bushings: Improve shift precision
Heavier Shift Knob: Smoother shift feel
Aftermarket Clutch: For increased torque capacity
Limited Slip Differential: Available for improved traction

Warranty Information

Original warranty coverage and extended protection options.

Original Warranty: 4 years/50,000 miles bumper-to-bumper from original purchase date.

Powertrain Coverage: Transmission covered under original warranty period.

Extended Warranty: Available through Acura or third-party providers for additional coverage.

Service Network: Authorized Acura dealerships nationwide for warranty repairs.

Technical Service Bulletins

Manufacturer-issued technical updates and service procedures.

TSB Number	Issue	Resolution
05-004	Cold weather shifting improvement	Updated shift linkage lubrication procedure
07-012	Transmission fluid specification update	Revised fluid change intervals and specifications
08-025	Clutch master cylinder seal update	Improved seal design for longer service life
10-018	Shift cable bushing replacement procedure	Updated installation method for shift cables

Service Information: Contact Acura Customer Service at 1-800-382-2238 or visit acura.com