Acura TL Manual Transmission Conversion

The Acura TL manual transmission conversion involves replacing the factory automatic transmission with a manual gearbox for improved driving dynamics and performance. This comprehensive guide covers the conversion process, required parts, installation steps, compatibility considerations, and performance benefits for various Acura TL model years.

1. Conversion Overview 2. Required Parts List 3. Tools and Equipment 4. Installation Process 5. Compatibility Guide 6. Wiring and Electronics 7. Clutch System Setup 8. Performance Benefits 9. Common Challenges 10. Maintenance Requirements 11. Troubleshooting

Conversion Overview

The manual transmission conversion transforms your Acura TL from automatic to manual shifting, providing enhanced driver engagement and performance characteristics.

Component	Description
Manual Transmission	6-speed manual gearbox from compatible Acura/Honda models
Clutch Assembly	Complete clutch kit including pressure plate and disc
Flywheel	Lightweight performance flywheel
Shifter Assembly	Manual shifter with linkage and cables
Pedal Assembly	Manual clutch pedal and hydraulic system
ECU Programming	Modified engine control unit for manual operation
Drive Shaft	Modified or replacement drive shaft
Crossmember	Transmission mount crossmember
Starter Motor	Compatible manual transmission starter
Speed Sensor	Manual transmission compatible vehicle speed sensor

Required Parts List

Complete inventory of components needed for successful manual transmission conversion.

Manual transmission assembly (6-speed preferred)
Clutch master cylinder and slave cylinder
Clutch pedal assembly with brackets
Manual transmission ECU or reprogrammed automatic ECU
Manual transmission drive shafts (axles)
Manual transmission mount and crossmember
Shifter assembly with cables and bushings
Flywheel and clutch kit (stage 1 or 2 recommended)
Transmission fluid (Honda MTF recommended)
Various bolts, brackets, and hardware specific to manual conversion

WARNING! Ensure all parts are compatible with your specific Acura TL model year and engine type.

Tools and Equipment

Professional-grade tools required for proper installation and alignment.

Transmission jack and engine support bar
Complete metric socket and wrench set
Torque wrench (capable of 100+ ft-lbs)
Hydraulic clutch bleeding kit
ECU programming software and interface
Transmission fluid pump
Clutch alignment tool
Various pry bars and specialty transmission tools

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

Installation Process

Preparation: Disconnect battery, drain fluids, secure vehicle on lift or jack stands.
Removal: Remove automatic transmission, torque converter, and related components.
Pedal Installation: Install clutch pedal assembly and master cylinder.
Transmission Mounting: Install manual transmission with proper alignment.
Clutch System: Install flywheel, clutch assembly, and hydraulic system.
Shifter Assembly: Install shifter mechanism and connect cables.
Electronics: Reprogram ECU and connect manual transmission sensors.
Final Assembly: Install drive shafts, fill fluids, and perform system checks.

Compatibility Guide

Understanding which manual transmissions work with specific Acura TL models and engine types.

3rd Generation (2004-2008): J-series V6 engines compatible with A-spec 6-speed manual transmissions. 4th Generation (2009-2014): J37 engine requires specific manual transmission adaptations.

Recommended donor vehicles: Acura TL Type-S, Honda Accord V6 manual, Acura CL Type-S. Transmission codes: A26, Y2M, and other compatible Honda/Acura manual gearboxes.

Wiring and Electronics

Critical electrical modifications required for proper manual transmission operation.

ECU reprogramming to disable automatic transmission controls
Installation of manual transmission speed sensors and connectors
Clutch pedal position sensor wiring
Reverse light switch connection
Neutral safety switch bypass or modification
Cruise control system adaptation
Instrument cluster modifications for gear indicator

Tip: Professional ECU tuning recommended for optimal performance and reliability.

Clutch System Setup

Proper installation and adjustment of hydraulic clutch system.

Bleed clutch hydraulic system thoroughly to remove air
Adjust clutch pedal free play to manufacturer specifications
Verify proper clutch engagement and disengagement
Test clutch operation before road testing
Allow proper break-in period for new clutch components
Check for fluid leaks at master and slave cylinders
Adjust clutch pedal height and travel as needed

WARNING! Improper clutch adjustment can cause premature wear and transmission damage.

Performance Benefits

Enhanced driving experience and mechanical advantages of manual transmission conversion.

Common Challenges

Typical issues encountered during manual transmission conversion and solutions.

CAUTION! Professional installation recommended for complex electrical and mechanical modifications.

Maintenance Requirements

Regular maintenance schedule for manual transmission components post-conversion.

Transmission fluid changes every 30,000 miles. Clutch system inspection every 15,000 miles. Shift linkage lubrication as needed. Regular checks for fluid leaks and component wear.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Difficulty shifting gears	Improper clutch adjustment	Adjust clutch pedal free play; bleed hydraulic system.
Gear grinding	Worn synchronizers or low fluid	Check transmission fluid level; inspect synchronizers.
Clutch slipping	Worn clutch components	Inspect clutch disc and pressure plate; adjust if possible.
Vibration during acceleration	Drive shaft imbalance	Balance drive shaft; check transmission mounts.
Check engine light	ECU programming issues	Verify proper ECU programming; check sensor connections.

Professional Assistance: Consult certified Acura specialists for complex electrical or mechanical issues.

Technical Support: Acura technical service bulletins and conversion specialist forums