Dodge 46RH Transmission

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Convert your Dodge 46RH to an Allison

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

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Introducing the ultimate upgrade for your heavy-duty vehicle: the Dodge 46RH to Allison 1000PK transmission conversion. Engineered for unparalleled performance, durability, and efficiency, this conversion transforms your Dodge’s powertrain into a world-class driving experience. The Allison 1000PK, renowned for its seamless gear changes and exceptional towing capabilities, is designed to handle the toughest tasks without breaking a sweat, ensuring your truck is always ready for the road ahead. Say goodbye to the limitations of the 46RH and embrace a new era of unrivaled capability and longevity with the Allison 1000PK transmission conversion—a choice that redefines what your Dodge can achieve.

46RH Transmission: An Overview, Key Features, and Common Concerns

Overview of the 46RH Transmission

The 46RH, also known as the A518, is a four-speed automatic transmission that was developed and produced by Chrysler in the early 1990s. Part of the TorqueFlite family, this transmission was initially introduced as a robust and reliable option for rear-wheel-drive vehicles, particularly trucks and SUVs under the Dodge, Jeep, and Ram brands. Designed with a hydraulic governor and an overdrive unit that's bolted to the rear of its 3-speed core, the 46RH brought together the proven durability of its predecessors with the added functionality of an overdrive fourth gear, making it ideal for highway driving as it reduces engine RPMs and improves fuel efficiency. The 46RH features a non-lockup torque converter and is known for its straightforward, rugged design—a key factor in its popularity among both casual drivers and automotive enthusiasts. While newer transmissions have surpassed the 46RH in terms of electronic control and a higher number of gears, the 46RH remains a beloved classic among those who prefer simplicity and dependability in their vehicle's transmission.

46RH Features

The Dodge 46RH, part of Chrysler’s TorqueFlite family, is a four-speed automatic transmission known for its robust and reliable performance. Here are some of its notable features:

  • Four-Speed Automatic: The 46RH comes with four forward gears, including an overdrive. This configuration provides flexibility across various driving conditions, enabling drivers to navigate low-speed terrains and high-speed highways alike.
  • High Torque Capacity: Engineered for heavy-duty applications, the NV5600 is designed to handle high levels of torque, making it ideal for towing and hauling heavy loads.
  • Hydraulic Governor: Unlike newer electronically controlled transmissions, the 46RH uses a hydraulic governor to control and manage gear shifts, which gives it a straightforward and robust design that many drivers appreciate for its reliability.
  • Overdrive Function: One of the significant upgrades in the 46RH is the overdrive unit bolted to the rear of its 3-speed core. This overdrive fourth gear reduces engine RPM at highway speeds, thereby improving fuel economy and reducing engine wear.
  • Non-Lockup Torque Converter: The 46RH features a non-lockup torque converter. This design ensures smoother transitions between gears, providing an easy and comfortable drive under normal operating conditions.
  • Durability: Built with rugged, heavy-duty components, the 46RH was designed for longevity and is capable of handling the demands of larger, more powerful engines, making it a popular choice for trucks and SUVs.
  • Simplicity and Serviceability: The 46RH is known for its straightforward design, which makes it relatively simple to service and repair. This is a major advantage for those who prefer to handle their vehicle maintenance or live in areas with limited access to advanced automotive service centers.
  • Compatibility: Originally manufactured for rear-wheel drive vehicles, the 46RH has been widely used in various Dodge, Jeep, and Ram models. Its relatively compact design for a heavy-duty transmission allows it to be adapted to a wide range of vehicles.
  • Adaptive Shift Scheduling: Although not as advanced as the electronic controls in newer models, the 46RH's hydraulic system is still sophisticated, using various pressure switches and the governor to adapt its shifting pattern according to the load and driving conditions.

In summary, the Dodge 46RH transmission is celebrated for its combination of simplicity, reliability, and durability. While it may lack some of the sophisticated electronic controls of newer models, it remains a solid choice for those looking for a dependable, serviceable, and hardworking transmission.

46RH Common Issues and Signs of Failures

While the 46RH transmission is known for its durability and simplicity, it is not immune to wear and tear or occasional failure, especially given its age. Below are some common issues and signs of failures associated with the 46RH transmission:

  • Slipping Gears: One of the most common symptoms of a failing 46RH transmission is when it unexpectedly changes gears or has trouble staying in gear. This is often described as ‘gear slipping’ and can be a sign that the transmission’s internal components are wearing down.
  • Delayed or Erratic Shifting: A 46RH transmission that is slow to change gears or shifts at unexpected times may be experiencing hydraulic control issues, worn clutches, or failing shift solenoids.
  • Fluid Leaks: Transmission fluid leaks are common problems. Fluid is crucial for the transmission’s operation, as it lubricates and cools internal components. Leaks can be a sign of worn seals or gaskets, a cracked pan, or other issues.
  • Overheating: The 46RH transmission is susceptible to overheating, particularly when the vehicle is subject to heavy loads or constant towing. Overheating can cause significant damage to the transmission’s internal components, and is often indicated by a burnt smell or transmission fluid discoloration.
  • Noisy in Neutral: A common issue with many transmissions, including the 46RH, is a tendency to be noisy when in neutral. This could be due to worn bearings or other internal components.
  • Failure to Engage Overdrive: The overdrive function in the 46RH transmission can fail due to issues with solenoids, a malfunctioning overdrive switch, or worn internal components.
  • Poor Transmission Response: A transmission that is slow to engage when shifting from park to drive or reverse may be experiencing issues with its hydraulic system, valve body, or other critical components.
  • Check Engine or Transmission Warning Light: Modern vehicles can detect problems with the transmission and activate a warning light on the dashboard. While the older vehicles with a 46RH transmission might not have this feature, those that do should not ignore this warning.
  • Unusual Sounds: Grinding, whining, or clunking noises coming from the transmission are usually a sign of mechanical problems inside the transmission, such as worn gears or bearings.
  • Dirty or Burnt Transmission Fluid: Healthy transmission fluid should be red and relatively clear. Fluid that is brown, black, or smells burnt is a sign that the transmission is overheating or experiencing significant wear.

These are general signs of 46RH transmission issues, and a professional diagnosis is always the best course of action when experiencing problems. Regular maintenance, including fluid and filter changes, can help prevent many of these issues and prolong the life of a 46RH transmission.

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 Dodge 46RH to an Allison 1000PK transmission is an intricate and detailed process. This conversion is about more than just swapping one transmission for another; it’s about upgrading your vehicle’s powertrain to deliver superior performance and efficiency. Here’s a step-by-step guide to guide you through this transformative process:

  1. Research and Planning

    • Confirm the compatibility of the Allison 1000PK with your vehicle's engine and drivetrain.
    • Investigate the availability of 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 46RH

    • Disconnect the battery.
    • Drain the transmission fluid.
    • Disconnect the transmission linkage, driveshaft, and any associated wiring or hydraulic connections.
    • Remove the 46RH 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 is highly recommended to work with a mechanic or shop that has experience with transmission swaps. Properly executed, this conversion can result in a vehicle that harnesses the exceptional performance and reliability of the Allison 1000PK.

46RH Rebuild

Rebuilding the Dodge 46RH Transmission

Rebuilding a Dodge 46RH 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 46RH 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, clutches, shafts, 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, clutches, and potentially gears or solenoids.
  6. Reassembly with New Parts: Carefully reassemble the 46RH 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 and Band Adjustment: Adjust the clutches and bands as per the manufacturer’s specifications. This is a critical step to ensure the transmission operates smoothly and without slipping.
  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 46RH 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 rebuilt 46RH transmission back into the vehicle, ensuring all connections are secure and properly aligned.
  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 engagements.
  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 Dodge 46RH are often necessary. Always refer to a service manual for the most accurate and detailed information.

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Replacing the Dodge 46RH Transmission

Replacing a Dodge 46RH transmission involves removing the old unit from the vehicle and installing a new or rebuilt one. This is a substantial project that requires a good understanding of automotive mechanics and access to the right tools. Here's a step-by-step guide to replacing a Dodge 46RH transmission:

  1. Preparation

    • Prepare a clean, organized workspace.
    • Gather all necessary tools, including a transmission jack, wrench set, and other specialty tools.
    • Make sure you have the replacement 46RH transmission ready.
  2. Acquire Necessary Parts

    • Purchase the replacement 46RH transmission.
    • Acquire a new or rebuilt torque converter compatible with your engine.
    • Obtain any required seals, gaskets, and filters.
  3. Safety First

    • Disconnect the vehicle’s battery to ensure safety while working with electrical components.
    • Secure the vehicle with wheel chocks and jack stands to prevent any movement.
  4. Drain the Transmission Fluid

    • Place a drain pan under the transmission and remove the drain plug to allow the fluid to drain completely.
  5. Remove Driveshaft and Linkages

    • Disconnect the driveshaft from the transmission.
    • Remove shift linkages and any associated hardware.
  6. Disconnect Electrical and Hydraulic Connections

    • Unplug any electrical connections related to the transmission, such as sensors.
    • Disconnect the transmission cooler lines.
  7. Support and Remove the Transmission

    • Place a transmission jack under the 46RH to support its weight.
    • Remove the bolts that secure the transmission to the engine and the transmission mount bolts.
    • Carefully lower and remove the transmission from the vehicle.
  8. Inspect and Prepare the Replacement Transmission

    • Inspect the replacement 46RH transmission for any issues and ensure it is clean and ready for installation.
    • Install a new torque converter, seals, and gaskets as necessary.
  9. Install the Replacement Transmission

    • Using the transmission jack, carefully lift the replacement 46RH into position.
    • Align it with the engine and secure it in place with the appropriate bolts. Torque the bolts to the manufacturer’s specifications.
  10. Reconnect Electrical and Hydraulic Connections

    • Plug in any electrical connections related to the transmission and reconnect the cooler lines.
  11. Install Driveshaft and Linkages

    • Reinstall the driveshaft and reconnect it to the transmission.
    • Reattach shift linkages and any associated hardware.
  12. Refill the Transmission with Fluid

    • After the transmission is secured, fill it with the recommended transmission fluid to the proper level as per the manufacturer’s specifications.
  13. Reconnect the Battery and Test

    • Reconnect the vehicle’s battery.
    • Start the vehicle and carefully test all gears under controlled conditions. Listen for unusual noises and feel for smooth shifting without slipping.
  14. Road Test

    • After the initial tests are successful, take the vehicle for a test drive under various conditions. Pay close attention to the shifting behavior of the transmission and ensure that it operates smoothly and responsively.
  15. Check for Leaks and Final Inspection

    • After the road test, inspect the transmission and connections for any leaks or loose bolts and make any necessary adjustments based on the road test feedback.
  16. Document the Replacement

    • Keep detailed records of the transmission replacement, including the date, any parts replaced, and any issues encountered. This documentation can be invaluable for future maintenance or repairs.

Please note that replacing a transmission is a significant and complex task. It's typically best handled by a professional mechanic or someone with substantial automotive repair experience. Always consult a service manual for the most accurate and detailed information specific to the Dodge 46RH transmission and your vehicle.

Benefits of converting to an Allison 1000PK Transmission

Converting from a Dodge 46RH 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

Enhanced Durability

The Allison 1000PK is designed for heavy-duty applications and is built to handle high torque and heavy loads. This makes it more durable and long-lasting compared to the Dodge 46RH.

Improved Towing Capability

The Allison 1000PK's superior torque handling capabilities and robust construction make it an excellent choice for towing heavy trailers or carrying heavy loads.

Smoother Shifting

The Allison 1000PK is renowned for its smooth and precise shifting, contributing to a more comfortable driving experience.

Better Fuel Efficiency

With its advanced design and efficient gear ratios, the Allison 1000PK can contribute to improved fuel economy under certain driving conditions.

Adaptive Shift Technology

The Allison 1000PK features adaptive shift technology that adjusts shift patterns based on driving conditions and driver behavior, resulting in optimized performance and responsiveness.

Increased Resale Value

Vehicles with the Allison 1000PK may have a higher resale value due to the recognized quality and performance of this transmission.

Lower Maintenance Costs

The Allison 1000PK's robust design and construction may lead to lower long-term maintenance costs due to its ability to withstand wear and tear better than other transmissions.

Versatility and Customization

The Allison 1000PK can be tuned and customized more extensively than many other transmissions, allowing for a more tailored driving experience.

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.

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