Dodge Transmission Interchange Guide – Find the Right Fit!

I once had to swap a Dodge transmission, and it wasn’t as simple as I thought. The biggest issue was finding a compatible transmission that matched my engine and ECU. I also had to modify the driveshaft and mounts to make it fit properly. 

The Dodge Transmission Interchange Guide helps you understand which transmissions can be swapped between Dodge vehicles. Not all transmissions are compatible due to differences in size, mounts, electronics, and torque capacity.

In this article, you’ll learn which Dodge transmissions can be swapped and what modifications you might need.

What is a Dodge transmission interchange guide – Get the Best Swap Tips!

A Dodge transmission interchange guide is a helpful resource that tells you which transmissions can be swapped between different Dodge vehicles. If you ever need to replace your transmission due to failure or want to upgrade for better performance.

Every Dodge model comes with a specific type of transmission that is designed to work with its engine, drivetrain, and electronic systems. However, some transmissions are used in multiple models or have similar designs.

How do I know if a Dodge transmission will fit my vehicle?

Determining whether a Dodge transmission will fit your vehicle involves several key factors. The most important things to check are the bolt pattern, bellhousing design, electronic compatibility, gear ratios, and driveshaft length. 

The first step is to find out what transmission model your Dodge currently has. You can check your owner’s manual, look at the transmission identification tag, or search online using your vehicle’s make, model, year, and engine type.

Can I swap an automatic transmission for a manual in my Dodge vehicle?

Yes, it is possible to swap an automatic transmission for a manual in a Dodge vehicle, but it’s a complex process that requires many modifications. This is because manual and automatic transmissions have completely different setups, from the way they mount to how they interact with the vehicle’s electronics.

Next, you’ll need a manual transmission that fits your engine. For example, if you have a Dodge Ram 1500, you might use an NV3500 or NV4500 manual transmission. The transmission’s bellhousing must match your engine, or you’ll need an adapter plate. 

What Dodge transmissions are most commonly interchangeable?

Several Dodge transmissions are interchangeable, especially within the same vehicle families. The most commonly swapped Dodge transmissions include:

• 42RE & 44RE: Found in older Dodge Dakotas, Durangos, and Jeep Grand Cherokees. These are relatively easy to swap between these vehicles.
• 46RE & 47RE: Used in Dodge Ram 1500 and 2500 trucks, as well as some Durango models. They are similar but have slight internal differences.
• 545RFE: This transmission is widely used in the Dodge Ram 1500, Durango, and Jeep Grand Cherokee, making it one of the easiest to interchange.
• 68RFE: Found in Dodge Ram 2500 and 3500 trucks, primarily with Cummins diesel engines. It’s often swapped with aftermarket versions for performance upgrades.
• 8HP70 & 8HP90: Used in modern Dodge Charger, Challenger, and Durango models, and can sometimes be interchanged with proper tuning.

Key differences between Dodge 46RE, 47RE, and 48RE transmissions?

The 46RE, 47RE, and 48RE are all part of the same transmission family, but they have important differences in strength and durability. These transmissions are commonly found in Dodge Ram trucks, and understanding their differences helps when considering an interchange.

While these transmissions look similar on the outside, they have different internal components that make them suited for different power levels. A 46RE transmission cannot handle the torque of a Cummins diesel engine.

Can I replace a Dodge 545RFE transmission with a 68RFE – Easy Dodge Trans Swap!

Swapping a 545RFE transmission for a 68RFE is not a straightforward process because they have several key differences. The 545RFE is a 5-speed automatic used in many Dodge Ram 1500, Durango, and Jeep Grand Cherokee models.

The first issue is size and mounting compatibility. The 68RFE is much larger and heavier than the 545RFE. It is designed for high-torque diesel engines, which means the bellhousing, torque converter.

Can I use an RWD Dodge transmission in a 4WD truck – Swap Like a Pro!

Swapping a RWD transmission into a 4WD truck is not a simple process because RWD and 4WD transmissions are designed differently. While the core transmission itself may be similar, there are key differences in how the output shaft and transfer case connect to the drivetrain.

The biggest difference is that a 4WD transmission has an extension housing designed to bolt up to a transfer case, which is needed to power all four wheels. In contrast, a RWD transmission has a tailshaft housing that connects directly to a driveshaft without a transfer case. 

How do I identify my Dodge transmission model – Fix Your Dodge Fast!

Check the Transmission Pan Shape:

The shape of the transmission pan (the metal cover on the bottom of the transmission) is a quick way to identify your model. Each Dodge transmission has a unique pan design, and you can compare it with reference charts online to match your transmission type.

Look for the Identification Tag:

Most Dodge transmissions have an ID tag or stamped markings on the transmission case. This tag includes important details like the transmission model number, build date, and serial number. Common locations include:

Check the Vehicle’s VIN Number:

Your Vehicle Identification Number (VIN), found on the dashboard or inside the driver’s door, can also help. By decoding the VIN, you can find out which transmission was factory-installed in your Dodge.

Use Online VIN Decoders or Dealer Support:

If you are unsure, you can use online VIN decoder tools or contact a Dodge dealership to confirm your transmission model based on your vehicle’s VIN. By following these steps, you can easily identify your Dodge transmission and ensure you get the correct replacement or repair parts.

Can I swap a Dodge transmission with a Jeep transmission?

Swapping a Dodge transmission with a Jeep transmission can sometimes work, but it depends on the model, engine, and drivetrain setup. Since Jeep is part of Stellantis (formerly Chrysler, FCA), many Dodge and Jeep vehicles share transmission designs. 

One of the most common interchangeable transmissions between Dodge and Jeep is the 545RFE, which is found in both Dodge Ram 1500, Durango, and Jeep Grand Cherokee models.

What is the best transmission upgrade for a Dodge Ram 1500?

If you want to upgrade the transmission in a Dodge Ram 1500, the best choice depends on your engine, driving needs, and budget. Some Ram 1500 models come with transmissions that are known to have weaknesses, and upgrading to a stronger or more durable transmission can improve performance and reliability.

For off-road or towing applications, many Ram 1500 owners upgrade to a 68RFE or a built 48RE. While the 68RFE is typically found in Ram 2500 and 3500 trucks, it can handle more power and torque. 

Can I swap a Dodge automatic transmission for a CVT transmission?

Swapping a traditional automatic transmission for a CVT (continuously variable transmission) in a Dodge vehicle is not recommended because of major mechanical and electronic differences.

A CVT transmission operates differently than a traditional automatic. Instead of fixed gears, it uses a belt and pulley system to provide seamless gear ratios. This makes it incompatible with most Dodge vehicles, 

FAQs:

Can I use an older Dodge transmission in a newer vehicle?

The biggest issue is electronic compatibility. Modern Dodge transmissions rely on advanced ECU programming and sensors to manage shifting, fuel economy, and power delivery. Older transmissions, such as the 46RE or 48RE, are hydraulically controlled, \

Can I swap a Dodge V6 transmission with a V8 transmission?

Swapping a V6 transmission with a V8 transmission in a Dodge vehicle is possible in some cases, but it requires checking bellhousing compatibility, torque capacity, and electronic controls.

Can I swap a Dodge automatic transmission for a manual?

Swapping a Dodge automatic transmission for a manual transmission is a popular modification among enthusiasts, but it is a complex process that requires major modifications to the drivetrain, electronics, and interior.

Can I use a Dodge truck transmission in a Charger or Challenger?

Swapping a Dodge truck transmission into a Charger or Challenger is not common, but it can work in specific cases. The main issue is that truck transmissions are built for towing and heavy loads.

Conclusion:

Swapping a Dodge transmission can be a great way to upgrade or replace a faulty unit, but it requires careful planning. Some transmissions, like the Torqueflite 727 and 904, swap easily, while modern ones need tuning and wiring adjustments. Truck transmissions, such as the 46RE, 47RE, and 48RE, can often be interchanged with minor modifications.