Redline Transmissions

Redline Transmissions OFFICIAL REDLINE TRANSMISSIONS Cummins and Duramax specialists! Automatic Transmissions. We Build it Better! All light duty diesels covered.

We build high-performance, heavy-duty transmissions for diesel pickup trucks built to handle more power, towing, and everyday reliability. Redline Diesel Power is northeastern Ohio's source for High Quality Transmissions, Performance, and Repair. We offer:

• Complete diesel truck repair & performance Cummins and Duramax—engine
• Automatic diesel transmissions For Dodge, GM, Ford
• Fuel Injection

Components
• Air intakes, Gauges,
• Hot Rod Diesel Pickup Truck Builds from Mild to Wild and Beyond! Our reputation has been built on problem solving in the power-train department, in house transmission building is just one service that has separated Redline from its competitors. We build transmissions that fit your application, regardless of power level. We can build a transmission that will hold and prove to be more efficient. Many transmission re-builders make this claim, but our experience gets it done. RedLine Diesel Power builds a full line of upgrades for light duty diesel trucks including: HD transmissions, billet covered torque converters with custom stall speeds, custom turbochargers & more. Performance upgrades designed & built for reliability & increased drive ability, available for Dodge, Ford & GM pickups. Our custom transmission packages feature billet components & the strongest gear trains available. Call for performance upgrades!

Our Phones are back up and running. Let’s make it a great Friday!
06/19/2026

Our Phones are back up and running. Let’s make it a great Friday!

06/18/2026

Our Phones are currently down. We apologize for any inconvenience this has caused. We hope the phone company gets them back up shortly.

Boxing up several sets of our 2013-2018 68RFE transmission lines today. These will also fit 2019-2024 RAM 68RFE’s. I put...
06/11/2026

Boxing up several sets of our 2013-2018 68RFE transmission lines today. These will also fit 2019-2024 RAM 68RFE’s. I put the link to order in the comments below. These are super high quality Stainless Steel replacements for the j***y unreliable factory aluminum lines. They work with a stock thermostatic bypass or any aftermarket bypass block. We also offer them with our custom machined billet bypass block. Get your set today and get your truck back on the road!

06/10/2026

Tow Boss 550 Allison that we just finished up! Give us a call today if you are in the market for a Transmission that will make your truck much more fun to drive! Daily Driver, Tow Vehicle or Race Truck we are your transmission solution! Mild to Wild.

I currently have a large selection of Allison core transmissions in stock. Why does this matter to me you ask? Well it h...
06/08/2026

I currently have a large selection of Allison core transmissions in stock. Why does this matter to me you ask? Well it happens to mean really low core charges on Allison Transmissions built and or shipped in the next 30 Days. Core charges starting at $500. This is helpful if your current transmission internals are destroyed. It is also helpful if we are shipping you a transmission. Saves return shipping charges and the hassle of core charges on your credit card. Mainly applicable to 2001-2010 models. Call today to schedule your build. 330-345-3000

04/23/2026

66RFE HD Boss 550 Build getting the finishing touches on the bench! We are your go to source for all of your 66RFE and 68RFE needs.

Another set of our 2013-2018 RAM 68RFE Transmission Lines shipping out! These are available on our website with or witho...
04/23/2026

Another set of our 2013-2018 RAM 68RFE Transmission Lines shipping out! These are available on our website with or without the thermal bypass block. They fit in the stock location. They are made out of high quality Stainless Steel and are the solution for replacing the failure prone factory aluminum lines. We have test fit them on 2019-2024 trucks and they work just fine in that application as well.

04/13/2026

72 Fast Build is progressing. Lots of modifications and Customization going on over here to get this thing done. It’s turning out Pretty Bad A$$ though!

Update on the 72 Fast truck Build. Lots of road blocks with custom parts fitment issues that I seem to constantly be wor...
03/29/2026

Update on the 72 Fast truck Build. Lots of road blocks with custom parts fitment issues that I seem to constantly be working through. Keep in mind for the most part I am working on this truck nights and weekends mostly by myself to keep my customer jobs getting done in a timely manner in the shop. Currently I have the Engine assembled, painted and installed in the truck. The transmission is built and installed in the truck along with the transfer case. Most of the chassis work is done. It is almost a full time job in itself to think ahead to order all the parts I need before I need them.

There is still a lot to do. I have to wire the entire truck, bend up and install all the brake lines. Plumb the entire fuel system, finish welding up the seat and shifter mounts, make a mounting solution for a radiator and intercooler that do not belong where they are going, etc.

Here are some pictures of the recent progress I have made on the truck.

Address

865 W. Liberty Street Suite 100
Medina, OH
44256

Opening Hours

Monday 8am - 12pm
1pm - 5pm
Tuesday 8am - 12pm
1pm - 5pm
Wednesday 8am - 12pm
1pm - 5pm
Thursday 8am - 12pm
1pm - 5pm
Friday 8am - 12pm

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