2004–2006 Mazda RX-8 Renesis 1.3L 4-Port Automatic Transmission Assembly – OEM RX8 Gearbox for Sale | J-Spec Auto Sports

J-Spec Auto Sports Inc. is offering a clean, low-mileage OEM automatic transmission assembly for the 2004–2006 Mazda RX-8, designed specifically for vehicles equipped with the 1.3L 13B-MSP Renesis 4-port rotary engine. This factory RX-8 automatic transmission provides smooth shifting performance and reliable operation for owners looking to replace a failing or worn gearbox.

The Mazda RX-8 Renesis powertrain is engineered to deliver a unique high-revving driving experience, and the automatic transmission used in these models is designed to work seamlessly with the rotary engine’s power delivery and rear-wheel-drive layout.

Each transmission sold by J-Spec Auto Sports is carefully inspected before shipment, ensuring customers receive a quality OEM drivetrain component ready for installation.

This RX-8 automatic transmission assembly is ideal for owners restoring their RX-8 or replacing a damaged or slipping transmission.

Transmission Specifications

• Vehicle Application: Mazda RX-8

• Transmission Type: Automatic Transmission Assembly

• Engine Compatibility: 13B-MSP Renesis 1.3L 4-Port Rotary Engine

• Drivetrain: Rear-Wheel Drive (RWD)

• Condition: Used / Clean OEM Transmission

• Origin: Imported / Low Mileage

Designed to deliver smooth gear transitions and dependable performance, this transmission maintains the factory driving feel of the RX-8.

Compatible Vehicles

This transmission fits the following vehicles equipped with the 4-port Renesis rotary engine:

Mazda RX-8

• 2004 Mazda RX-8

• 2005 Mazda RX-8

• 2006 Mazda RX-8

Engine Type:

• 1.3L 13B-MSP Renesis 4-Port Rotary Engine

Always verify compatibility with your VIN, transmission code, or existing unit before installation.

What’s Included

This transmission assembly typically includes:

• Complete RX-8 automatic transmission housing and internals

• Torque converter (may vary depending on stock unit)

• Transmission case and mounting points

Accessories such as wiring harnesses, sensors, or external components may vary depending on the unit currently in stock.

Signs Your RX-8 Transmission May Need Replacement

Common symptoms of a failing RX-8 transmission include:

• Delayed gear engagement

• Slipping gears during acceleration

• Hard or rough shifting

• Transmission warning lights

• Fluid leaks or overheating

Replacing the unit with a clean OEM automatic transmission restores the smooth performance your RX-8 was designed to deliver.

Why Buy From J-Spec Auto Sports?

J-Spec Auto Sports specializes in high-quality engines, transmissions, and rare JDM drivetrain components.

Our inventory frequently includes:

• Mazda RX-8 rotary engines and transmissions

• Subaru WRX & STI turbo engines

• Honda and Acura performance motors

• Toyota and Nissan transmissions

• Rare JDM performance parts

Every drivetrain component is inspected prior to shipping to ensure quality and reliability.

Shipping Information

This Mazda RX-8 automatic transmission assembly will be professionally palletized and shipped via freight carrier anywhere in the United States.

Local pickup may also be available.

Contact J-Spec Auto Sports Inc. for pricing, availability, and shipping quotes.