Acura TL Manual Transmission Swap

The Acura TL manual transmission swap involves converting an automatic transmission Acura TL to a manual transmission configuration. This comprehensive guide covers the process, required parts, tools, installation steps, and considerations for successfully completing this modification. Below are key sections covering planning, parts sourcing, installation procedures, and post-swap adjustments.

1. Overview and Benefits 2. Required Parts List 3. Tools and Equipment 4. Pre-Installation Preparation 5. Removal Process 6. Installation Steps 7. Electrical and ECU Modifications 8. Clutch and Hydraulic System 9. Testing and Break-in 10. Common Issues and Solutions 11. Maintenance and Care

Overview and Benefits

Key advantages of manual transmission conversion: improved driving engagement, better acceleration response, increased reliability, and enhanced resale value for enthusiasts.

Benefit	Description
Driving Experience	Greater control over gear selection and engine RPM
Performance	Reduced power loss through drivetrain
Reliability	Simpler mechanical design with fewer failure points
Weight Reduction	Manual transmission typically lighter than automatic
Maintenance	Lower long-term maintenance costs
Resale Value	Higher demand among performance enthusiasts

Required Parts List

Essential components needed for complete manual transmission swap.

Manual transmission assembly (TL-S or compatible)
Clutch kit (pressure plate, disc, release bearing)
Flywheel (resurfaced or new)
Manual transmission ECU or reprogrammed automatic ECU
Clutch master cylinder and slave cylinder
Manual transmission pedal assembly
Shift linkage and shifter assembly
Manual transmission driveshaft
Starter motor (manual transmission compatible)
All necessary bolts, brackets, and hardware

IMPORTANT! Verify part compatibility with your specific TL model year and engine type.

Tools and Equipment

Professional tools required for successful transmission swap.

Transmission jack and engine support bar
Complete socket set (metric)
Torque wrench (capable of 100+ ft-lbs)
Hydraulic line bleeding kit
Clutch alignment tool
Fluid catch pans and funnels
Jack stands and floor jack
Various pry bars and specialty tools

SAFETY WARNING! Always use proper jack stands and safety equipment when working under vehicle.

Pre-Installation Preparation

Proper preparation ensures smooth installation process.

Disconnect battery and drain transmission fluid
Document wiring connections with photos
Label all electrical connectors and vacuum lines
Clean work area and organize tools
Verify all replacement parts are present and correct
Review service manual for torque specifications

NOTE: Allow adequate time - professional installation typically takes 8-12 hours.

Removal Process

Step-by-step automatic transmission removal procedure.

Remove air intake and battery for access
Disconnect shift cable and transmission cooler lines
Remove driveshaft and exhaust components as needed
Support engine with proper support bar
Disconnect wiring harness and sensors
Remove transmission mount and crossmember
Lower transmission using transmission jack
Remove torque converter and flexplate

CAUTION! Transmission is heavy - use proper lifting equipment and assistance.

Installation Steps

Manual transmission installation procedure.

Flywheel Installation: Clean mounting surface, apply thread locker, torque to specification
Clutch Assembly: Use alignment tool, gradual bolt tightening pattern
Transmission Mounting: Guide into position, ensure proper alignment
Pedal Assembly: Install clutch pedal and master cylinder
Hydraulic System: Route lines, fill and bleed system
Shift Linkage: Install shifter assembly and adjust linkage
Final Connections: Connect sensors, fill with transmission fluid

Electrical and ECU Modifications

Required electrical changes for proper manual transmission operation.

ECU Programming: Flash manual transmission software or install manual ECU. Neutral Safety Switch: Bypass or reprogram for manual operation. Reverse Lights: Connect to manual transmission reverse switch. Cruise Control: May require clutch switch integration. Dashboard Lights: Address any transmission-related warning lights.

Clutch and Hydraulic System

Clutch system installation and bleeding procedure.

Install clutch master cylinder to firewall
Route hydraulic line to slave cylinder
Bleed system thoroughly to remove air
Adjust clutch pedal free play
Test clutch engagement point
Verify proper disengagement

Tip: Use quality DOT 4 brake fluid for hydraulic system.

Testing and Break-in

Post-installation testing and clutch break-in procedure.

Initial start-up: Check for leaks and unusual noises
Clutch break-in: 500 miles of gentle driving
Gear engagement test: Verify smooth shifting
Road test: Check all gears under various conditions
Final inspection: Re-torque critical fasteners

WARNING! Avoid aggressive shifting during break-in period to prevent clutch damage.

Common Issues and Solutions

Issue	Possible Cause	Corrective Action
Hard shifting	Improper clutch adjustment	Adjust clutch hydraulic system
Gear grinding	Syncromesh wear	Check transmission fluid level and condition
Clutch slippage	Improper break-in	Replace clutch if severely damaged
Vibration	Driveshaft imbalance	Balance driveshaft or check U-joints
Warning lights	ECU programming	Verify proper ECU software installation

Professional Help: Consult experienced mechanic for persistent issues.

Maintenance and Care

Regular maintenance for manual transmission longevity.

Change transmission fluid every 30,000 miles. Inspect clutch hydraulic fluid regularly. Check for leaks at hydraulic connections. Monitor clutch wear and adjustment. Lubricate shift linkage as needed.

RECOMMENDATION: Use manufacturer-recommended transmission fluid for optimal performance.