BP4WD-Off-road vehicle accessories
8-Speed Automatic Transmission Upgrade Kit for Jeep Wrangler JK / JKU (5-Speed to 8-Speed)
8-Speed Automatic Transmission Upgrade Kit for Jeep Wrangler JK / JKU (5-Speed to 8-Speed)
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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
At the heart of this upgrade is the BP‘ PCS Transmission Control System,
a proprietary controller designed to integrate seamlessly with the JK’s original electronic architecture via CAN-bus.
fully plug-and-play.
Kit Components
- PCS Smart Transmission Controller
-
8-Speed Transmission Adapter Assembly
- Dedicated Plug-and-Play Wiring Harness
- Upgrade kits vary depending on the model.
Compatible Vehicles
| Model | Years | Engine | Factory Transmission |
|---|---|---|---|
| Jeep Wrangler JK / JKU | 2011–2018 | 3.6L Pentastar V6 (Gasoline) | W5A580 (5-Speed Automatic) |
Fully compatible with JK (2-Door) and JKU Unlimited (4-Door) models, including Sport, Sahara, and Rubicon trims.
Not suitable for diesel (CRD) engines.
Compatible 8-Speed Transmissions
| Transmission | Typical Donor Application | Recommended Use |
|---|---|---|
| ZF 8HP45 / 8HP50 | 3.6L gasoline engines | Ideal for stock or lightly modified 3.6L builds |
| ZF 8HP70 | HEMI V8 applications | High torque margin, suitable for future V8 upgrades |
| ZF 8HP75 | HEMI V8 applications | Heavy-duty use, off-road or high-power builds |
Ideal For
- JK / JKU owners seeking a modern 8-speed transmission feel
- Daily driving upgrades with smoother and faster response
- Overland, all-terrain, and long-distance builds
- Future HEMI or LS gasoline engine swap projects
- Enthusiasts upgrading from the factory 5-speed automatic
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.
