Acura Legend Manual Swap

The Acura Legend manual transmission swap involves replacing the factory automatic transmission with a manual transmission system. This conversion typically includes the manual transmission, clutch assembly, flywheel, pedal assembly, shifter mechanism, driveshaft modifications, and ECU reprogramming. Below are key sections covering planning, parts required, installation process, wiring modifications, and troubleshooting.

Planning and Preparation

Proper planning is essential for a successful manual transmission swap. Assess vehicle condition and gather all necessary components before beginning.

Required Parts List

Complete list of components needed for the manual transmission conversion.

• Manual Transmission: From compatible Acura Legend
• Clutch Assembly: Pressure plate, clutch disc, release bearing
• Flywheel: Manual transmission specific flywheel
• Pedal Assembly: Manual brake and clutch pedal setup
• Shifter Assembly: Complete shifter mechanism with linkage
• Driveshaft: Manual transmission compatible driveshaft
• ECU: Manual transmission ECU or reprogrammed unit
• Hydraulic System: Clutch master and slave cylinders with lines

Tools and Equipment

Essential tools required for the manual swap procedure.

1. Transmission jack and vehicle lift
2. Socket set (metric 8mm-19mm)
3. Torque wrench
4. Clutch alignment tool
5. Bleeding kit for hydraulic system
6. Wire crimping and soldering tools
7. Transmission fluid pump

WARNING! Use proper safety equipment including jack stands and protective gear.

Transmission Removal

Step-by-step procedure for removing the automatic transmission.

1. Disconnect battery and drain transmission fluid
2. Remove driveshaft and exhaust components as needed
3. Disconnect shift linkage and wiring harnesses
4. Support engine with proper support fixture
5. Remove transmission mounting bolts and crossmember
6. Carefully lower transmission using transmission jack

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

Manual Transmission Installation

Installing the manual transmission assembly.

1. Install new flywheel and torque to specification
2. Mount clutch assembly using alignment tool
3. Lubricate input shaft splines with high-temperature grease
4. Raise transmission into position and align with engine
5. Install mounting bolts and torque to factory specifications
6. Reinstall crossmember and transmission mounts

Clutch and Flywheel Setup

Proper installation of clutch components and flywheel.

Pedal Assembly Installation

Installing manual pedal assembly in vehicle cabin.

1. Remove existing automatic brake pedal assembly
2. Install manual brake and clutch pedal assembly
3. Mount clutch master cylinder to firewall
4. Connect hydraulic line to slave cylinder
5. Adjust pedal height and free play
6. Bleed hydraulic system completely

Tip: Bench bleed master cylinder before installation for easier system bleeding.

Shifter and Linkage

Installing shifter mechanism and linkage components.

1. Install shifter assembly in transmission tunnel
2. Connect shift linkage and adjust for proper engagement
3. Install shift boot and console components
4. Test shifter movement through all gears
5. Adjust linkage for smooth, precise shifting

Wiring and ECU Modifications

Electrical modifications required for manual conversion.

• Neutral Safety Switch: Bypass or modify for manual operation
• Reverse Lights: Connect to manual transmission reverse switch
• ECU Programming: Install manual ECU or reprogram existing unit
• Speed Sensor: Ensure proper connection to manual transmission sensor
• Clutch Switch: Install for cruise control and start interlock

Testing and Troubleshooting

Final testing procedures and common issues.

Final Check: Test drive in safe area; check all gears and clutch operation.

Support: Consult Acura Legend forums for specific technical assistance.