Subaru OEM Ring & Pinion Gear Set - 4.44 AT Subaru Baja / Forester / Impreza / Legacy / Outback | 38100AB400

Overview

The Genuine Subaru OEM Ring & Pinion Set (Part #38100AB400) delivers a precise 4.44 final drive ratio engineered specifically for Subaru automatic transmission-equipped vehicles. Designed and manufactured to exact factory specifications, this OEM differential gear set ensures optimal power transfer, smooth engagement, and long-term drivetrain reliability — making it the definitive replacement choice for maintaining your Subaru's factory performance standards.

Key Features & Benefits

• Genuine OEM Quality — Manufactured to exact Subaru factory tolerances, guaranteeing a perfect fit and factory-level performance with zero guesswork.
• 4.44 Final Drive Ratio — Purpose-built gear ratio optimized for Subaru automatic transmission applications, preserving the intended power delivery and fuel efficiency characteristics.
• Precision-Cut Gear Teeth — Factory gear cutting and heat treatment processes ensure maximum strength, quiet operation, and extended service life under normal driving conditions.
• Exact-Fit Replacement — Direct drop-in replacement for the OEM ring and pinion; no modifications or adaptations required during installation.
• Factory Warranty Eligible — As a Genuine Subaru OEM part, this component is backed by Subaru's standard OEM parts warranty.
• Matched Gear Set — Ring and pinion are matched as a set at the factory, ensuring proper gear mesh, backlash, and contact pattern.

What's Included

• 1x Genuine Subaru OEM Ring Gear
• 1x Genuine Subaru OEM Pinion Gear
• (Matched as a factory set — Part #38100AB400)

Specifications

Fitment & Compatibility

This Genuine Subaru OEM Ring & Pinion Set (38100AB400) is designed for Subaru vehicles equipped with an automatic transmission requiring a 4.44 final drive ratio, for the following vehicles:

Please verify your vehicle's differential and transmission codes before ordering. Confirm exact fitment using your VIN or consult your Subaru dealer parts department to ensure this is the correct ring and pinion for your specific year, model, and drivetrain configuration.

Installation

Ring and pinion replacement is an advanced drivetrain service requiring specialized tools, including a dial indicator for backlash measurement, a bearing press, and a torque wrench. Proper setup of gear contact pattern and backlash is critical for long-term reliability and quiet operation. Professional installation by a qualified Subaru technician or experienced drivetrain specialist is strongly recommended. Incorrect installation may result in premature gear failure, noise, or differential damage.