Welcome to the G56 Swap Guide

A growing resource for 2006–2012 and 2013–2018 Dodge Cummins trucks being converted to a G56 manual transmission.

This site was built from personal experience, along with helpful input from others in the community, to make G56 swaps easier to understand and complete. Whether you’re doing your first swap or just looking for specific details, you’ll find practical information, wiring help, parts guidance, and more.

What You’ll Find Here

Step-by-Step Instructions – Full removal, installation, and troubleshooting coverage. Page coming soon.
General Information – Transmission length, adapter information, driveshaft details, and other key swap basics.
Electrical Guide – Step-by-step wiring help for reverse lights, 4×4 low, no-start issues, and more. Updated 12/4/24.
ECM Flashing – Information and guidance for ECM flashing related to your swap.
Parts and Tools List – Common tools, required parts, and recommended components to help you get started.
Store Page – Hard-to-find parts, kits, and custom solutions are planned for the future. Page coming soon.

Latest Website Updates

3/12/2026: Join the waitlist below to be notified when harness production resumes. I should be able to start making them again in April.
1/22/2026: I am currently not taking any new swap harness orders at this time.
~~9/21/2025: The new forums are live. Sign up, ask questions, and help others out here: G56Swap Forums~~
9/13/2025: Added more content and pictures to the Electrical Guide, mainly for 2013+ trucks.

What’s Coming Next

This guide is still a work in progress, and I’m continuing to expand it over time. Planned additions include:

Detailed Photos and Videos – Visual walkthroughs for major parts of the swap.
Frequently Asked Questions – Common problems, answers, and troubleshooting tips.
Community Contributions – Tips, feedback, and real-world experience from other G56 swappers.
Complete G56 Swap Harness – A cleaner, easier wiring solution designed to simplify the swap process. Read more here.

G56 Swap Harness

The plug-and-play G56 Swap Harness is designed to simplify G56 transmission swaps for 2006–2018 Dodge Ram Cummins trucks. Built with factory-style connectors and quality wiring, it provides a cleaner and more reliable way to integrate a manual swap when converting from an automatic setup.

To learn more about the harness and how it works, click here for full details.

Orders are currently paused while the next production batch is being prepared.
Join the waitlist below to be notified when ordering opens again.

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You're on the list! G56 Swap Harness orders are currently closed, but you will be notified as soon as the next batch becomes available. Thank you for your interest.

Need Help?

If you have questions, you can reach me directly at [email protected]. I’ve personally helped with 20+ swaps on 2006–2018 trucks.

You can also join the discussion in the Facebook group G56 Swap How To for troubleshooting advice, swap discussion, and support from others in the community. I’m not affiliated with the Facebook group, and I do not currently use Facebook myself.

We also recently launched a forum right here on g56swap.com where members can ask questions, introduce themselves, and show off their builds.

Thanks for stopping by, and happy swapping.
– Aaron

Help Wanted

Have G56 swap experience, photos, videos, or useful info to share?

I’m building this site out of pure passion for these trucks. There’s no monetization and no paid roles — just shared knowledge to help more people complete their swaps the right way.

If you’d like to contribute tips, photos, corrections, or real-world experience, feel free to send it over. I may include it on the site.

👉 Click here to get involved on the forum FORUM HAS SHUT DOWN. NOT ENOUGH USE…