Dodge 68RFE Transmission

Dodge Ram Emblem

Convert your Dodge 68RFE to an Allison

Transform Your Drive: Making the Switch to an Allison 1000PK Transmission

Configure your truck

Upgrade your ride with a transformative conversion from a Dodge 68RFE to an Allison 1000PK transmission. Renowned for its exceptional strength, smooth operation, and unbeatable durability, the Allison 1000PK offers unparalleled performance that leaves the 68RFE in its wake. Whether you're hauling heavy loads, embarking on a cross-country journey, or demanding optimal control and response from your vehicle, this conversion promises enhanced efficiency, reduced maintenance costs, and a driving experience that’s second to none. Make the switch today and empower your Dodge with the gold standard of transmissions—the Allison 1000PK.

68RFE Transmission: An Overview, Key Features, and Common Concerns

Overview of the 68RFE Transmission

The 68RFE is a six-speed automatic transmission designed and manufactured by Chrysler, introduced in the late 2000s to pair primarily with Dodge Ram 2500 and 3500 series trucks equipped with the formidable Cummins turbodiesel engine. Engineered for durability and strength, the 68RFE has gained a reputation among truck owners for its capability to handle substantial towing and hauling demands. Its fully electronic operation allows for adaptive learning and shift control, aimed at optimizing shift quality and ensuring long-term reliability.

Its six forward gears, including a double overdrive, enable a broad range of gear ratios for optimal power and fuel efficiency across a wide array of driving conditions. Constructed with a robust steel case and utilizing a multi-plate clutch design, the 68RFE is designed to withstand considerable abuse, making it well-suited for heavy-duty applications. Its smart electronic controls adjust and refine shift points based on driving conditions, allowing for both comfortable cruising and responsive, high-torque shifting when necessary.

As automatic transmissions have become the norm in modern trucks due to their convenience and efficiency, the 68RFE serves as a testament to this trend. It is designed for the driver who seeks the combination of heavy-duty capability without sacrificing the comfort and ease of an automatic transmission. For those who require a dependable, hardworking transmission that can tackle heavy loads and tough tasks without frequent intervention, the 68RFE remains a strong and reliable choice.

68RFE Features

The 68RFE transmission is a heavy-duty staple in Dodge Ram trucks, known for its blend of performance and durability. Here are some key features that make the 68RFE stand out:

  • High Torque Capacity: Engineered for heavy-duty applications, the 68RFE is designed to handle high levels of torque, ideal for towing and hauling substantial loads.
  • Adaptive Learning and Shift Control: Advanced electronic controls allow the 68RFE to adapt to varying driving conditions and optimize shift points for performance, comfort, and fuel economy.
  • Durable Construction: The 68RFE is built to last, featuring a rugged steel case and multi-plate clutch design for durability and longevity under heavy-duty use.
  • Wide Gear Ratio Spread: With six forward gears, including a double overdrive, the 68RFE offers an extensive range of gear ratios, balancing powerful low-end performance with fuel-efficient cruising.
  • Integrated Electronic Controls: This feature ensures optimal and consistent shift quality, adapting to driver input and external conditions to maximize efficiency and reliability.
  • Torque Converter Clutch: A torque converter clutch system allows for a direct engine-to-transmission linkage under certain conditions, improving efficiency and reducing heat.
  • Lock-Up Capability: The 68RFE offers lock-up in multiple gears, further enhancing fuel economy and cooling efficiency.

In summary, the 68RFE is a robust, reliable, and technologically advanced automatic transmission designed to meet the rigorous demands of heavy-duty truck applications. Its features are meticulously engineered to offer drivers a harmonious blend of control, substantial towing capacity, and steadfast performance under a multitude of conditions.

68RFE Common Issues and Signs of Failures

While the 68RFE transmission is designed for durability and robust performance, like all mechanical components, it can have its issues. Here are some common problems associated with the 68RFE transmission, along with signs that it might be failing:

  • Overheating: One of the main issues with the 68RFE is overheating, especially under heavy loads. This can lead to premature wear of components and potential failure. Installing an auxiliary transmission cooler is often recommended.
  • Solenoid Failures: The 68RFE’s solenoids can fail, resulting in erratic shifting or loss of gears. This usually triggers a check engine light and requires replacement of the solenoid pack.
  • Worn Clutch Packs: Under heavy loads, the clutch packs can wear prematurely, resulting in slipping gears and eventual transmission failure.
  • Valve Body Issues: Problems with the valve body can lead to irregular shifts, delayed shifting, or harsh shifts. Reconditioning or replacing the valve body is a common solution.

Regular maintenance, including timely fluid and filter changes with appropriate transmission fluid, can significantly extend the life of a 68RFE transmission and prevent many of these issues. When experiencing any of these symptoms, it is advisable to consult with a professional mechanic or transmission specialist to diagnose and address the problem before it results in a complete transmission failure.

Your Guide to Rebuilding, Replacing, and Upgrading to an Allison Transmission

Rebuild, Replace, Converting to an Allison

Convert to Allison

Converting to an Allison 1000PK Transmission

Converting from the 68RFE to an Allison 1000PK transmission is a similarly intricate task, requiring strategic planning, specific tools, and expertise in transmission swaps. Similar to transitioning from a manual to an automatic system, this conversion involves extensive changes to both mechanical and electrical components of the vehicle. Below is an outline of the steps involved:

  1. Research and Planning

    • Determine the compatibility of the Allison 1000PK with your vehicle's engine and drivetrain.
    • Ensure you have access to any necessary custom parts or kits designed for this conversion.
    • Compile a comprehensive list of parts and tools required for the job.
  2. Acquire Necessary Parts

    • Purchase the Allison 1000PK transmission.
    • Acquire a new or modified bell housing compatible with your engine.
    • Obtain a suitable transmission control module (TCM) for the Allison.
    • Get any required wiring harnesses, adapters, and connectors.
    • Source an upgraded or suitable transmission cooler.
  3. Removal of 68RFE

    • Disconnect the battery.
    • Drain the transmission fluid.
    • Disconnect the transmission linkage, driveshaft, and any associated wiring or hydraulic connections.
    • Remove the 68RFE transmission from the vehicle.
  4. Preparation and Modification

    • Check the vehicle's transmission tunnel for adequate space. Modify or fabricate as necessary to accommodate the Allison 1000PK.
    • If the existing motor mounts, crossmembers, or transmission mounts are incompatible, install or fabricate new ones.
  5. Install the Allison 1000PK

    • Position the new transmission using a transmission jack and bolt it to the engine using the appropriate bell housing.
    • Ensure all connections are secure, including any mechanical linkage or hydraulic lines, if applicable.
  6. Electronics and Wiring

    • Install the TCM in an appropriate location, typically within the vehicle's cabin or engine bay.
    • Route and connect the wiring harness, ensuring all connections are secure.
    • Integrate the Allison's electronics with the vehicle's existing electrical system, ensuring the TCM communicates correctly with the engine control unit (ECU).
  7. Cooling System Installation

    • Install the transmission cooler, ensuring it’s adequately positioned for airflow.
    • Connect the transmission cooling lines between the Allison 1000PK and the cooler.
  8. Drive Shaft and Final Connections

    • Depending on the length adjustment requirements, either modify the existing driveshaft or obtain a custom one.
    • Install the driveshaft, ensuring it's correctly aligned and securely connected at both ends.
  9. Fluids and Testing

    • Fill the Allison 1000PK with the recommended transmission fluid.
    • Reconnect the battery.
    • Start the vehicle and test all gear positions for correct operation.
    • Take the vehicle for a test drive, ensuring the transmission shifts smoothly and the TCM functions correctly.
  10. Final Adjustments

    • After the test drive, check for any leaks, noises, or irregularities.
    • Make any necessary adjustments to the linkage, wiring, or other components.

Documentation and Legal Considerations:

  • Ensure all changes to the vehicle are documented for future reference or resale.
  • Check with local regulations to ensure the conversion is compliant with emissions, safety, or other legal requirements.

Due to the complexity of this conversion, it's highly recommended to work with a mechanic or shop that has experience with transmission swaps, particularly when dealing with the specifics of the 68RFE to Allison 1000PK conversion. When done correctly, this conversion can result in a vehicle that benefits from the robustness and efficiency of the Allison 1000PK transmission.

NV5600 Rebuild

Rebuilding the Dodge 68RFE Transmission

Rebuilding a 68RFE transmission is a detailed and meticulous process that requires a good understanding of transmission components, as well as access to specialized tools. The goal of a rebuild is to restore the transmission to optimal working condition by replacing worn or damaged parts. Here's a step-by-step outline of the process:

  1. Preparation and Safety: Make sure the work area is clean and organized. Disconnect the battery of the vehicle, and ensure you have all necessary tools and parts before starting.
  2. Disassembly: Carefully disassemble the 68RFE transmission, organizing and inspecting all components as they are removed. Take note of any visibly worn or damaged parts.
  3. Cleaning: Clean all disassembled parts thoroughly with a parts cleaner solution or solvent. This is crucial for revealing any hidden wear or damage.
  4. Inspection and Assessment: Closely inspect all components, including gears, bearings, clutch packs, valve body, solenoids, and seals for wear or damage. Use this inspection to compile a list of parts that need replacement.
  5. Acquire Replacement Parts: Based on the inspection, purchase the necessary replacement parts. This will likely include bearings, seals, gaskets, clutch packs, and potentially solenoids or a valve body.
  6. Reassembly with New Parts: Carefully reassemble the 68RFE transmission, replacing the worn or damaged parts with the new components. Pay close attention to the reassembly order and torque specifications for all bolts and fasteners.
  7. Clutch Clearance and Endplay Setting: Set the clutch pack clearances and endplay for bearings as per the manufacturer’s specifications. This is a critical step to ensure the transmission operates smoothly and without excessive wear.
  8. Sealing and Gasket Installation: Install new seals and gaskets during reassembly to prevent any fluid leaks. Make sure all surfaces are clean and flat before installing the gaskets.
  9. Final Assembly and Inspection: Once the 68RFE is reassembled, double-check all components, fasteners, and settings. Make sure everything is installed correctly and torqued to the proper specifications.
  10. Reinstallation of the Transmission: Reinstall the transmission into the vehicle, ensuring all connections and mounts are secure.
  11. Refill with Transmission Fluid: After the transmission is reinstalled, fill it with new, clean transmission fluid to the proper level as per the manufacturer’s specifications.
  12. Testing: Reconnect the battery and start the vehicle. Carefully test all gears under controlled conditions. Listen for unusual noises and feel for smooth shifting without slipping or harsh engagement.
  13. Road Test: After the initial tests are successful, take the vehicle for a test drive under various conditions. Pay attention to the shifting behavior of the transmission and ensure that it operates smoothly and responsively.
  14. Final Adjustments and Checks: After the road test, recheck the fluid levels and look for any signs of leaks or unusual noises. Make any necessary adjustments based on the road test feedback.
  15. Documentation: Keep detailed records of the rebuild process, including parts replaced and any issues encountered. This documentation can be invaluable for future maintenance or repair.

Please note that rebuilding a transmission is a highly technical task that generally requires a skilled mechanic or experienced DIYer. Specialized tools and manuals specific to the 68RFE are often necessary. Always refer to a service manual for the most accurate and detailed information.

Replace 68RFE

Replacing the Dodge 68RFE Transmission

Replacing a transmission is a significant undertaking that involves removing the old transmission from the vehicle and installing a new or refurbished one. This process requires mechanical skills, a well-equipped workspace, and various tools. Here's a step-by-step outline of the process:

  1. Preparation and Safety: Ensure the work area is clean, organized, and safe. Disconnect the battery of the vehicle, set up proper lighting, and gather all necessary tools and replacement parts before starting.
  2. Vehicle Lifting and Support: Safely lift the vehicle using a floor jack and secure it with jack stands. Ensure it is stable and secure before proceeding.
  3. Removal of Necessary Components: Depending on the vehicle, this may include removing components such as the driveshaft, crossmember, exhaust, and heat shields to access the transmission.
  4. Disconnect Electrical and Mechanical Linkages: Disconnect all electrical connectors, control linkages, and hydraulic lines connected to the transmission.
  5. Transmission Removal: Support the transmission with a transmission jack or equivalent. Remove the bolts that secure the transmission to the engine and carefully lower and remove the transmission from the vehicle.
  6. Inspection of Related Components: Before installing the new transmission, inspect other components like the flywheel, clutch (if manual), torque converter (if automatic), and transmission mounts for wear or damage.
  7. Installation of the Replacement Transmission: Carefully raise the replacement transmission into position using a transmission jack. Align it with the engine and secure it with the appropriate bolts, torqued to the manufacturer's specifications.
  8. Reconnect Electrical and Mechanical Linkages: Reconnect all the electrical connectors, control linkages, and hydraulic lines to the new transmission.
  9. Reinstallation of Removed Components: Reinstall all previously removed components, including driveshaft, crossmember, exhaust, and heat shields.
  10. Refill with Transmission Fluid: After the new transmission is installed, fill it with new, clean transmission fluid to the proper level as per the manufacturer’s specifications.
  11. Testing: Reconnect the battery and start the vehicle. Carefully test all gears under controlled conditions. Listen for unusual noises and feel for smooth shifting without slipping or harsh engagement.
  12. Road Test: After the initial tests are successful, take the vehicle for a test drive under various conditions. Pay attention to the shifting behavior of the new transmission and ensure that it operates smoothly and responsively.
  13. Final Adjustments and Checks: After the road test, recheck the fluid levels and look for any signs of leaks or unusual noises. Make any necessary adjustments based on the road test feedback.
  14. Documentation: Keep detailed records of the transmission replacement process, including the old transmission's issues, parts replaced, and any issues encountered with the new transmission. This documentation can be invaluable for future maintenance or repair.

Please note that replacing a transmission is a highly technical task that generally requires a skilled mechanic or experienced DIYer. Specialized tools and manuals specific to the vehicle are often necessary. Always refer to a service manual for the most accurate and detailed information.

Benefits of converting to an Allison 1000PK Transmission

Converting from a Dodge 68RFE manual transmission to an Allison 1000PK automatic transmission can bring several benefits, depending on the specific needs and use of the vehicle. Here are some notable advantages of making such a conversion.

Renowned Durability and Reliability

The Allison 1000 series is known for its robust construction and long service life, making it a popular choice among heavy-duty truck owners who need a transmission that can withstand severe duty cycles without frequent breakdowns.

Improved Towing Capacity

The Allison 1000PK is designed for heavy-duty applications and can significantly increase a vehicle’s towing and payload capacities. This is perfect for those who regularly tow heavy trailers or haul substantial loads.

Enhanced Shift Quality

The Allison 1000PK is engineered for smooth and precise shifting. Its advanced control system constantly adapts to changes in the vehicle’s operating conditions, resulting in consistently seamless and efficient shifting.

Greater Fuel Efficiency

The Allison 1000PK is designed for optimal fuel economy, particularly under heavy-load conditions. Its precise and adaptive shift strategies can help to reduce fuel consumption, which is a significant benefit for long-haul or frequent drivers.

Compatibility with High Torque Engines

For those with powerful diesel or modified engines, the Allison 1000PK is designed to handle high torque outputs, making it an excellent match for such setups without risking premature wear or failure.

Modern Features and Technologies

The Allison 1000PK comes with advanced features, such as adaptive learning capabilities that adjust shift patterns based on the driver’s behavior and operating conditions, enhancing the driving experience.

Reduced Wear on Other Components

Automatic transmissions can help reduce wear on associated drivetrain components, as the computer-controlled shifts can be more consistent and less stressful on the equipment than manual shifting.

Increased Vehicle Resale Value

An Allison transmission is often seen as a premium upgrade, which can increase the resale value of the vehicle. Prospective buyers may be willing to pay more for a vehicle with a reliable and well-regarded transmission.

Global Service Network

Allison transmissions are supported by a comprehensive global service network. This means that, no matter where you are, you're likely to find a qualified service technician who is familiar with your transmission.

Customizable Operation

The Allison 1000PK allows for a degree of customization in its operation, letting drivers or fleet managers tailor the transmission’s behavior to suit specific needs or preferences, which is especially useful for commercial applications.

Ease of Maintenance

Allison transmissions are designed to be relatively easy to service, with extended fluid change intervals and clear service protocols. This can lead to lower maintenance costs over the life of the transmission.

What's included in an Allison Conversion kit?

We provide everything you will need to get the swap done right

Duramax with Allison Transmission
    • Kit Includes
    • Transmission
      Torque Converter
      Wiring Harness
      Flex Plate adapter
      Transfer Case
      Mounting Kit
      Cooling Kit
      Digital Display
      Allison TCM
      CAC TCM
Allison 1000PK Transmission

Allison 1000PK Transmission

Upgrade your vehicle's capabilities with the esteemed Allison 1000PK Transmission. You have the option to either include this component in your kit purchase or use your own pre-acquired Allison 1000PK transmission. To cater to your needs, we also provide transmission rebuilding services. Explore a comprehensive selection of other Allison transmissions here that we can expertly convert.

How to determine the Right Torque Converter

Maximizing Performance: Using Tire Diameter and Gear Ratio Calculations to Choose the Ideal Torque Converter

How to determine the right torque converter


Converting your Dodge Ram's transmission to an Allison can result in numerous benefits including improved durability, enhanced towing capability, increased fuel efficiency, and smoother gear shifts, thus optimizing your vehicle's performance.

Most Dodge Ram models can benefit from an Allison transmission conversion, but it's advisable to consult with a specialist to ensure compatibility with your specific model.

Yes, with the right adapters, your existing Dodge Ram transfer case can be utilized in an Allison conversion.

The Allison 1000 series is a popular choice for Dodge Ram vehicles due to its reliability and performance, but the best option depends on your particular needs and vehicle model.

The conversion process involves removing your Dodge Ram's current transmission, fitting the Allison transmission with the necessary adapters, and installing it. The wiring harness, TCM, and other components are also adjusted accordingly.

Yes, an Allison transmission is designed to provide smoother shifts, increased durability, and better fuel efficiency, all of which contribute to improved vehicle performance.

An Allison conversion kit typically includes components such as the transmission (if chosen), TCM, torque converter, wiring harness, adapters, and other necessary parts for the conversion.

You have the option to either provide your own Allison transmission or include it with your conversion kit purchase.

While it's possible for experienced individuals to do the conversion, it's generally recommended to hire a professional to ensure the job is done correctly and safely.

The conversion time can vary based on the vehicle and the specific conversion kit. On average, it might take a few days to complete.

An Allison conversion could affect your vehicle's warranty depending on the specific terms of your warranty agreement. We recommend checking with your warranty provider before proceeding with the conversion.

If you face any problems after the conversion, it's best to contact your conversion specialist for troubleshooting assistance or potential service needs.

Yes, an Allison transmission from another vehicle can be used, provided it's compatible with your Dodge Ram model. Ensure to consult with your conversion specialist before proceeding.

Yes, we do offer rebuilding services for Allison transmissions, ensuring your transmission is operating at peak performance.

The cost can vary significantly depending on the specific Allison model, whether you're providing the transmission or purchasing it as part of the kit, and any additional services required. Please contact us directly for a more precise estimate.

Rolling mountain scape

Financing Available

Financing is available, so that you can get on the road faster

3524 Garcon Point Road

Milton, FL 32583

(865) 253-1133