Acura Integra Manual Transmission Rebuild

The Acura Integra manual transmission rebuild process involves disassembling, inspecting, replacing worn components, and reassembling the transmission to restore optimal performance. This guide covers the B-series transmissions commonly found in Acura Integra models, including the B18 and B16 variants. Below are key sections for safety precautions, required tools, disassembly, inspection, reassembly, and testing procedures.

Safety Precautions

Always work in a well-ventilated area with proper lighting. Wear safety glasses and gloves during disassembly.

1. Disconnect battery before starting any work.
2. Use jack stands to securely support the vehicle.
3. Drain transmission fluid before removal.
4. Keep work area clean and organized to prevent lost components.

WARNING! Transmission components are heavy; use proper lifting techniques. Avoid contact with used transmission fluid.

Required Tools and Parts

Essential tools and replacement parts needed for a complete transmission rebuild.

Transmission Removal

Proper procedure for removing transmission from vehicle.

1. Disconnect battery and drain transmission fluid.
2. Remove air intake and battery tray for access.
3. Disconnect shift linkage and clutch hydraulic line.
4. Remove axle shafts and starter motor.
5. Support engine with jack and remove transmission mounts.
6. Lower transmission carefully using transmission jack.

CAUTION! Do not let transmission hang on input shaft. Support weight properly during removal.

Disassembly Process

Step-by-step transmission disassembly.

1. Clean exterior and mount in transmission stand.
2. Remove clutch release bearing and fork.
3. Remove end cover and inspect shift forks.
4. Remove input shaft assembly carefully.
5. Remove output shaft and differential assembly.
6. Document component orientation for reassembly.

Tip: Take photos during disassembly to aid reassembly.

Component Inspection

Critical inspection points for transmission components.

• Gears: Check for chipped teeth and excessive wear.
• Synchronizers: Inspect for worn brass rings and damaged teeth.
• Bearings: Check for roughness, noise, or play.
• Shift Forks: Look for bending or wear on contact surfaces.
• Shafts: Inspect splines for wear and check runout.
• Seals: Replace all seals regardless of condition.

Replacement Parts

Common replacement components for B-series transmissions.

Reassembly Procedure

Proper reassembly sequence and specifications.

1. Install new bearings using proper press tools.
2. Assemble synchronizer hubs with new components.
3. Install shift forks and rods with new springs.
4. Set proper preload on differential bearings.
5. Use new gaskets and seals throughout assembly.
6. Torque all bolts to factory specifications.

Torque Specs: Case bolts: 29 ft-lbs, End cover: 16 ft-lbs, Drain plug: 33 ft-lbs

Transmission Installation

Reinstalling transmission into vehicle.

1. Install clutch and pressure plate (new recommended).
2. Align clutch disc using alignment tool.
3. Lift transmission into position with jack.
4. Reconnect all mounts and linkages.
5. Install axles and fill with proper fluid.
6. Bleed clutch hydraulic system.

Fluid Capacity: B-series transmissions require 2.1 quarts of Honda MTF.

Testing and Break-in

Post-installation testing procedures.

1. Check for leaks with vehicle stationary.
2. Test shift operation with engine off.
3. Start engine and test clutch operation.
4. Test all gears while stationary.
5. Road test with gradual acceleration.
6. Avoid hard shifts for first 500 miles.

Break-in Period: Allow 500 miles for synchronizers to seat properly.

Troubleshooting

Common issues and solutions after rebuild.

Professional Help: If issues persist, consult with transmission specialist.