8-Speed Transmission Swap for Jeep JK/JKU  3.6L Or Hemi

Upgrade for smoother shifts, better fuel efficiency, and superior off-road performance

8-Speed (8hp) Kit
Jeep JK 8-speed Conversion | Jeep Speed Shop

Why Upgrade to the 8-Speed Transmission

  • More Gears for Smoother Shifting:
    The 8HP has 8 gears compared to the 4 gears in the 42RLE. This means smoother transitions between speeds, whether you’re cruising on the highway or climbing a steep trail.

  • Better Fuel Efficiency:
    The additional gears allow the 8HP to keep the engine running at an optimal RPM, improving fuel economy and saving you money at the pump.

  • Improved Acceleration:
    With more gears and faster shifting, the 8HP provides quicker acceleration, making your Jeep feel more responsive and powerful.

  • Enhanced Off-Road Control:
    The 8HP offers better low-end gearing, giving you more control and torque for tackling tough trails and obstacles.

  • Stronger and More Reliable:
    The 8HP is built to handle higher horsepower and torque, making it a more durable and dependable choice for upgraded or heavily used Jeeps.

  • Quieter and Smoother Operation:
    Unlike the 42RLE, which can feel clunky or noisy, the 8HP delivers a smoother and quieter driving experience, both on and off the road.

  • Modern Technology:
    The 8HP features advanced electronics that optimize performance, providing better adaptability to driving conditions compared to the older, less sophisticated 42RLE.

  • Reduced Heat Build-Up:
    The 8HP generates less heat during operation, which reduces wear and tear on the transmission and improves overall longevity.

  • Increased Towing Capacity:
    With its superior strength and design, the 8HP enhances your Jeep’s ability to tow, making it ideal for hauling trailers, boats, or heavy gear.

  • Designed for Bigger Upgrades:
    If you’re running larger tires, lifted suspension, or a V8 engine, the 8HP is built to handle the extra load, unlike the 42RLE, which can struggle with heavy modifications.

  • Proven Performance:
    The 8HP is used in modern high-performance vehicles, showing its reliability and capability as a top-tier transmission.

  • Future-Proof Your Jeep:
    Upgrading to the 8HP ensures your Jeep is equipped with a transmission that meets modern performance standards, keeping it relevant and reliable for years to come.

HOW TO SUCCESSFULLY transmission SWAP YOUR JEEP JK

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Locate Your 8HP Transmission

Finding the right 8-speed transmission is the first step to upgrading your Jeep. Here are some great resources to help you locate one:

  • Jeep Speed Shop V8 Swappers Facebook Group: Connect with over 3.5K Jeep enthusiasts who can provide advice, leads, or even sell you the right transmission.
  • Salvage Yards: Look for modern vehicles that used the 8HP transmission, such as Dodge Rams
  • Online Marketplaces: Search platforms like eBay, Craigslist, or dedicated Jeep forums for transmissions from reputable sellers.
  • Local Dealerships: Contact local Dodge or Jeep dealerships to inquire about new or lightly used transmissions.

Start your search today and set your Jeep up for success!

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Source the Additional Mopar Parts

To complete your 8-speed transmission swap, you’ll need to gather specific Mopar parts that aren’t included in the kit. Be sure to review the 8-Speed Build of Materials for a detailed list of the required components.

This step ensures that your swap is seamless and fully functional—double-check the materials list and source high-quality parts from trusted suppliers. If you have questions about what’s needed, the Jeep Speed Shop team is ready to help!

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Purchase the Correct Parts from Jeep Speed Shop

Jeep Speed Shop offers a complete 8HP swap kit, designed to make upgrading your 3.6L or Hemi Swapped Jeep JK/JKU as straightforward as possible. While the kit includes everything you need for the swap, we know you might still have questions—don’t hesitate to reach out to our team for expert advice and support!

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Research The Process

Every build is unique, so it’s essential to research how your specific 8-speed transmission swap will come together. While Jeep Speed Shop provides support during your build, taking the time to understand the process is your responsibility.

Resources to Help You Succeed:

  • JSS YouTube Channel: Watch detailed tutorials and tips, including this helpful video guide.
  • JSS V8 Swappers Facebook Group: Connect with other builders and gain insights from their experiences. Link
  • Jeep JK Gear & Gadgets: A great resource for Jeep-specific tools and information. Link
  • Sand Shark Customs: Explore additional tips and tricks for custom Jeep builds. Link

The more you research, the smoother your swap will be!

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