BP4WD-Off-road vehicle accessories
For Jeep Wrangler JK / JKU 5-Speed to 8-Speed Transmission Conversion Kit
For Jeep Wrangler JK / JKU 5-Speed to 8-Speed Transmission Conversion Kit
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This conversion kit is specifically engineered for Jeep Wrangler JK and JKU gasoline models (2007–2018),
allowing owners to upgrade from the factory 5-speed automatic transmission to a modern, high-performance 8-speed automatic.
Compatible with both the 3.8L V6 (2007–2011) and 3.0/3.6L Pentastar V6 (2012–2018) engines,
this system delivers faster, smoother shifting and a noticeable improvement in throttle response and fuel efficiency.
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 | 2007–2011 | 3.8L V6 Gasoline | 42RLE (4-Speed Auto) |
| Jeep Wrangler JK / JKU | 2012–2018 | 3.0/3.6L Pentastar V6 Gasoline | W5A580 (5-Speed Auto) |
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 | Donor Vehicle | Recommended Use |
|---|---|---|
| ZF 8HP70 | Suitable engine for JK to modify HEMI V8 | Ideal balance of torque and compatibility |
| ZF 8HP75 | Suitable engine for JK to modify HEMI V8 | Heavy-duty or Hemi swap applications |
| ZF 8HP45 / 8HP50 | Original 3.0/3.6 engine (without modification) | Lightweight option for 3.6L engines |
Ideal For
- All-terrain and long-distance builds
- Daily driving upgrades for smoother, faster response
- Hemi or LS gasoline engine swap projects
- JK/JKU owners seeking modern performance and transmission feel
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.
