Manual transmission AA9AHB 2.0 SUBARU BRZ TOYOTA GT86 2014 24TKM

manual transmission for the Toyota GT86 and Subaru BRZ with the manufacturer code AA9AHB (often paired with the model code JB0) is the high-performance 6-speed gearbox designed by Aisin (specifically the Aisin AZ6 / TL70). This unit is the standard manual transmission for the first-generation ZN6/ZC6 chassis.

1. Technical Specifications (AA9AHB)

• Transmission Type: 6-Speed Manual (Aisin TL70).

   

• Engine Compatibility: 2.0L FA20 / 4U-GSE Boxer Engine.

   

• Drivetrain: Rear-Wheel Drive (RWD).

   

• Mileage Note: A unit with 24,000 km (24TKM) is considered low-mileage and is in high demand for replacements or manual conversions.

• Torque Rating: Stock capacity is approximately 205 Nm (151 lb-ft), though it is known to reliably handle up to 300 Nm before internal upgrades or performance clutches are typically required.

2. Gear Ratios

This gearbox features short, aggressive ratios designed for keeping the naturally aspirated FA20 engine in its powerband.

3. Critical Compatibility & Identification

• Toyota vs. Subaru: While the casing may carry different Toyota (e.g., SU003-06380) or Subaru stickers, the AA9AHB code confirms it is the same physical unit used across both brands.

• The “Kouki” Update (2017+): For the 2017 facelift, Toyota/Subaru updated the manual transmission for improved durability (strengthened gears and different final drive of 4.30). The 2014 AA9AHB unit is fully compatible with these later cars, but you must ensure the final drive ratio matches your differential for accurate speedometer readings.

• Swap Projects: This specific gearbox is popular for engine swaps (like the 1JZ/2JZ or Honda K-Series) using adapter plates from brands like PMC Motorsport, specifically because of its compact size and mechanical shifter feel.