8-Speed Automatic Transmission Upgrade Kit for Jeep Wrangler JK / JKU (5-Speed to 8-Speed)

This conversion kit is specifically engineered for 2011–2018 Jeep Wrangler JK and JKU gasoline models equipped with the 3.6L Pentastar V6 engine.

It allows owners to upgrade from the factory 5-speed automatic transmission (W5A580) to a modern, high-performance 8-speed automatic transmission, delivering a dramatically improved driving experience.

Designed exclusively for the 3.6L gasoline platform, this system provides:

• Faster and smoother gear changes
• Improved throttle response
• Better gear ratio coverage for on-road and off-road use
• Enhanced driving comfort for daily driving and long-distance travel
• Uses the Factory JK Shifter Assembly – No JL Electronic Shifter Required

Kit Components

• BP Transmission Protocol Module 
• 8-Speed Transmission Adapter Assembly
  
• Dedicated Plug-and-Play Wiring Harness
• Oil pipes and fittings
• Transfer case adapter
• gearbox crossbeam
• Upgrade kits vary depending on the model.

Compatible Vehicles

Fully compatible with JK (2-Door) and JKU Unlimited (4-Door) models, including Sahara, and Rubicon trims.
Not suitable for diesel (CRD) engines.

Compatible with select ZF 8HP transmissions commonly found in:

• RAM 1500 (3.6 850RE, 5.7 8HP70, 6.4 8HP75)
• Dodge Durango (3.6 845RE/850RE,5.7 8HP70, 6.4 8HP75 )
• Jeep Grand Cherokee 
• Jeep Wrangler JL (3.6 8HP75)
• Jeep Gladiator JT (3.6 8HP50)

Please note:   

This solution requires programming the valve body computer. If programming is not possible, please select the option that includes the valve body computer.

Technical Notice:
Powertrain swaps and drivetrain configurations are highly vehicle-specific. Variations in engine, transmission, transfer case, ECU calibration, and mounting geometry may affect compatibility.
To ensure correct fitment and optimal performance, please contact our technical team before placing your order.
Every build is unique—and that’s where the real joy of vehicle modification begins.

Note: If you need to buy a second-hand gearbox, please contact us

DELIVERY POLICY: most of the countries will arrive within 10 working days. Some countries may be delayed, please contact us in advance.

🚙Countries that support DDP shipping🚙 ，you can place orders directly.

Shipping: Not included. Users can place orders directly and the system will automatically calculate shipping costs. 

Tariffs: For countries that support DDP shipping, this price includes taxes. For users in other countries, taxes are not included. Please contact us first.

Pre-Order Note: If you want to sell our products in your country, please contact us for agent policy.