2008 Acura TSX Manual Transmission

The 2008 Acura TSX features a 6-speed manual transmission with close-ratio gearing, smooth shift action, and precise clutch engagement. This sport sedan's manual gearbox is designed for responsive performance and driver engagement, complementing the 2.4-liter i-VTEC engine. Below are key sections covering operation, maintenance, specifications, and troubleshooting for the manual transmission system.

1. Transmission Overview 2. Operation Guidelines 3. Maintenance Schedule 4. Technical Specifications 5. Gear Ratios & Performance 6. Clutch System 7. Transmission Fluid 8. Common Issues 9. Service & Repair 10. Warranty Information 11. Troubleshooting

Transmission Overview

The 6-speed manual transmission in the 2008 Acura TSX provides sporty driving dynamics with smooth gear changes and excellent shift feel.

Component	Description
Gearbox Type	6-speed manual, front-wheel drive
Shift Mechanism	Short-throw shifter with positive engagement
Synchromesh	Carbon-lined synchronizers on all forward gears
Final Drive Ratio	4.764:1
Transmission Mount	Hydraulic damping for reduced vibration
Shift Linkage	Cable-operated for precise gear selection
Reverse Gear	Lock-out mechanism to prevent accidental engagement
Gear Position Sensor	Provides gear position data to ECU

Operation Guidelines

Proper manual transmission operation ensures longevity and optimal performance.

Clutch Engagement: Depress clutch fully before shifting; release smoothly.
Gear Selection: Use firm, deliberate shifts without forcing the lever.
Rev Matching: Downshift with appropriate engine RPM matching.
Hill Starts: Use parking brake for assistance on steep inclines.
Skip Shifting: Direct shifts (e.g., 2nd to 4th) are acceptable during light acceleration.

WARNING! Do not rest hand on shift lever while driving; avoid riding the clutch.

Maintenance Schedule

Regular maintenance ensures transmission reliability and performance.

Transmission Fluid: Replace every 30,000 miles or 2 years with Honda MTF.
Clutch Fluid: Check reservoir level monthly; replace every 3 years.
Shift Linkage: Inspect for wear every 15,000 miles.
Clutch System: Check engagement point and pedal free play during oil changes.

CAUTION! Use only recommended transmission fluid; improper lubricants can damage synchronizers.

Technical Specifications

Transmission Code: M6SH
Gear Count: 6 forward, 1 reverse
Transmission Fluid Capacity: 2.2 quarts (2.1 liters)
Fluid Type: Honda Manual Transmission Fluid (MTF)
Clutch Type: Single dry disc with diaphragm spring
Clutch Fluid: DOT 4 brake fluid
Shift Pattern: H-pattern with reverse left and up
Weight: 98 lbs (44.5 kg) including fluid

Gear Ratios & Performance

The close-ratio gearing optimizes acceleration and fuel efficiency.

Gear	Ratio	MPH per 1000 RPM
1st	3.266	5.8 mph
2nd	1.888	10.0 mph
3rd	1.321	14.3 mph
4th	1.034	18.3 mph
5th	0.825	22.9 mph
6th	0.658	28.7 mph
Reverse	3.583	-

Redline: 7100 RPM; Fuel cut-off: 7200 RPM

Clutch System

Hydraulic clutch system with self-adjusting mechanism.

Clutch Pedal: Smooth operation with consistent engagement point.
Master Cylinder: Mounted on firewall; connects to clutch pedal.
Slave Cylinder: Mounted on transmission bellhousing.
Clutch Disc: Organic facing material for smooth engagement.
Pressure Plate: Diaphragm spring design for consistent clamping force.
Flywheel: Single-mass design for responsive engine characteristics.

Tip: Clutch pedal free play should be 0.4-0.8 inches (10-20mm).

Transmission Fluid

Proper fluid maintenance is critical for transmission longevity.

Fluid Check: Park on level surface; remove fill plug with 3/8" drive.
Fluid Level: Should be at bottom of fill hole threads.
Drain Procedure: Remove drain plug; allow complete draining.
Refill: Use hand pump to add fluid until it runs out fill hole.
Torque Specs: Fill/Drain plugs: 36 lb-ft (49 N·m)

WARNING! Transmission fluid may be hot after driving; allow to cool before service.

Common Issues

Typical manual transmission concerns and their causes.

Grinding Gears: Worn synchronizers or low fluid level
Difficulty Shifting: Damaged shift linkage or clutch hydraulic issues
Clutch Chatter: Contaminated clutch disc or worn pressure plate
Transmission Noise: Worn bearings or insufficient lubrication
Fluid Leaks: Damaged seals or overfilled transmission

Service & Repair

Professional service recommendations for transmission maintenance.

Clutch Replacement: Typically required at 80,000-120,000 miles.
Synchro Service: Requires transmission disassembly by qualified technician.
Shift Linkage Adjustment: May require realignment if shifting becomes imprecise.
Bearing Replacement: Input/output shaft bearings may wear over time.

CAUTION! Transmission disassembly requires special tools and expertise.

Warranty Information

Original warranty coverage for 2008 Acura TSX manual transmission: 4 years/50,000 miles basic warranty. Powertrain coverage: 6 years/70,000 miles. Consult Acura dealer for specific transmission warranty details and current recall information.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Hard to shift into gear	Low clutch fluid, air in system	Check fluid level; bleed clutch hydraulic system
Gear grinding	Worn synchronizers, incorrect fluid	Replace transmission fluid; inspect synchronizers
Clutch slipping	Worn clutch disc, hydraulic issue	Check clutch engagement; inspect clutch components
Transmission noise	Low fluid, worn bearings	Check fluid level; inspect for bearing wear
Vibration in gear	Worn mounts, damaged CV joints	Inspect engine/transmission mounts; check axle condition

Service: Contact Acura dealer for professional diagnosis and repair.

Support: 1-800-382-2238; www.acura.com