Jaguar XJR X306 4.0 Supercharged Automatic Gearbox NNA4400EAE WARRANTY

Listing details

The gearboxes are sold with a 90-day warranty! They were tested before removal and are in full working order.

Jaguar XJR X306 4.0 Supercharged Automatic Gearbox WARRANTY is an original component from the Automatic transmissions category, designed for Jaguar XJR X306 generation models with a 4.0 engine. This used, factory-spec automatic transmission ensures the performance characteristics intended by the manufacturer, resulting in stable drivetrain operation and predictable response to load.

Specifications and technical data

• SKU: NNA4400EAE
• Mark: Jaguar
• Condition: Used
• OEM Part Number: NNA4400EAE
• Substitutable numbers: NNA4400EAE
• Gearbox type: Automatic
• Category: Automatic Transmission

Technical specifications and intended use

The presented transmission belongs to the Jaguar automatic transmissions group and was designed specifically for the requirements of the 4.0 unit in the XJR X306 model. The use of an automatic transmission allows for smooth torque transfer, reduced jerking during gear changes, and a comfortable driving experience in both city traffic and at higher speeds.

The automatic transmission type is factory-tuned to the character of this high-power saloon, which is significant for component durability, torque converter operation, and shift logic. Choosing an original, used transmission from the same model minimizes the risk of fitment issues and facilitates integration with the vehicle's existing electronics.

Benefits of using an original automatic transmission

For a specific model like the XJR X306, maintaining compatibility with the factory configuration is crucial. Using an original automatic transmission allows you to:

• maintain the correct gear shift characteristics intended for the 4.0 engine,
• ensure compatibility with factory controllers and the vehicle's wiring,
• reduce the risk of improper drivetrain operation after replacement,
• facilitate diagnostics and service thanks to compliance with manufacturer documentation.

For users who value the originality of the design and predictable drivetrain behavior, choosing such a transmission is a technically safe solution consistent with the manufacturer's specifications.

Condition, verification, and practical application

The item comes from a Jaguar vehicle and is offered as a used part, allowing for economical repair while maintaining factory specifications. Before installation, standard workshop procedures are recommended: checking for leaks, verifying mounting points, inspecting connectors, and preparing the transmission oil cooling system in accordance with service recommendations.

Proper selection of the transmission for a specific XJR X306 version is key to the correct operation of the entire drivetrain. In case of doubt, it is worth comparing the parameters with the vehicle's documentation or consulting a specialized service center dealing with Jaguar models to ensure full installation and functional compatibility.

Jaguar automatic transmissions – expansion and selection

If you are planning a comprehensive repair or upgrade of the drivetrain area in your Jaguar and need other components from the same group, such as transmissions for other engine versions, additional housings, or compatible torque converters, check the available parts in the Jaguar automatic transmissions category.

Why consider an original used transmission?

In the event of a transmission failure, many users face a choice between expensive refurbishment and installing an original, used unit. In the case of advanced automatic designs, such as those in the XJR X306, a factory transmission with preserved configuration often proves to be a cost-effective and technically sound solution. You can read about when such a decision makes the most sense in the article: Manual transmission failures in cars – why is an original used part a more sensible choice than refurbishment?