Subaru OEM 4th Gear Driven (06-21 STI) | 32276AA270

Overview

The Genuine Subaru OEM 4th Gear Driven (Part #32276AA270) is an exact-fit factory replacement transmission gear engineered specifically for the Subaru WRX STI. Designed for drivers who demand OEM precision in their manual gearbox, this driven gear ensures seamless 4th gear engagement, correct gear ratio, and long-lasting durability. Whether you're rebuilding a high-mileage STI transmission or replacing a damaged gear, this is the factory-spec component that guarantees a perfect fit without guesswork.

Key Features & Benefits

• Genuine Subaru OEM Construction – Manufactured to Subaru factory specifications, ensuring the same quality, tolerances, and materials as the original component installed at the factory.
• Exact-Fit Guarantee – Designed exclusively for 2006–2021 Subaru WRX STI applications; no modifications or adaptation required for a direct drop-in installation.
• Correct 4th Gear Ratio – Maintains the factory-engineered drive ratio for optimal power delivery, fuel efficiency, and transmission harmony at highway speeds.
• Factory Warranty Coverage – As a Genuine Subaru part, this gear is backed by Subaru's OEM parts warranty when installed by an authorized dealer or qualified technician.
• High-Strength Gear Steel – Precision-machined from the same grade of hardened gear steel used in original STI transmissions, offering excellent wear resistance under high-torque conditions.
• Part Number Cross-Reference – Replaces or corresponds directly to OEM Part #32276AA270; use this number to verify fitment with your Subaru dealer or parts catalog.

What's Included

• 1x Genuine Subaru OEM 4th Gear Driven – Part #32276AA270

Specifications

Fitment & Compatibility

This genuine Subaru OEM 4th Gear Driven (Part #32276AA270) is compatible with the following vehicles:

Always verify fitment using your vehicle's VIN or consult your Subaru dealer with Part #32276AA270 to confirm compatibility before ordering.

Installation

Installation of this 4th Gear Driven requires full transmission disassembly and is recommended for experienced transmission rebuilders or professional Subaru technicians. This is not a bolt-on external part — it is an internal transmission gear that must be installed during a gearbox rebuild or gear replacement service. Proper bearing preload, shimming, and torque specifications from the Subaru service manual must be followed to ensure correct installation and long-term reliability.