AUTOMATIC TRANSMISSIONS

RAM 6.7L CUMMINS AS69RC TOWMASTER TRANSMISSIONS

BD Diesel AS69RC Towmaster transmission packages provide heavy-duty durability and increased clutch capacity for 2013-2024 Ram 3500, 4500, and 5500 trucks powered by the 6.7L Cummins diesel.

  • 600 HP Rated

    Built to handle the output of modified 6.7L Cummins engines.

  • 300 PSI Line Pressure

    Upgraded valve body boosts clutch holding and converter lockup capacity.

  • Up To 40% More Clutches

    Added frictions in the K2, K3 and B1 packs for higher torque capacity.

  • Billet K2 Hub & K3 Drum

    Resolves notorious K2 spline wear and resists K3 ring groove failure.

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FITMENT GUIDE

Review vehicle model years and chassis configurations below to select the appropriate AS69RC Towmaster package for your Ram heavy-duty truck.

Note: Always confirm your truck's model year, drivetrain (2WD vs. 4WD), and PTO location on the product page before ordering.

ApplicationEngineCommon YearsTypical ProductBest For
Ram 3500 / 4500 / 5500 4WD6.7L Cummins Diesel2019-2024Towmaster Package 1065014SS / 1065014PTOSSHeavy hauling, commercial towing, and modified 2019+ 4WD trucks
Ram 3500 / 4500 / 5500 2WD6.7L Cummins Diesel2019-2024Towmaster Package 1065012SS / 1065012PTOSS / 1605042SSCommercial fleet and hotshot 2WD chassis-cabs with or without PTO
Ram 3500 / 4500 / 5500 4WD6.7L Cummins Diesel2013-2018Towmaster Package 1064274SSHeavy-duty towing and high-torque 2013-2018 4x4 work trucks
Ram 3500 / 4500 / 5500 2WD6.7L Cummins Diesel2013-2018Towmaster Package 1064272SS / 1064382SSHigh-mileage 2WD haulers and left-hand PTO commercial vocational rigs

SOLUTION GUIDE

Factory Aisin AS69RC transmissions are built for commercial duty, but heavy hauling and aftermarket tuning quickly reveal internal structural and hydraulic weaknesses. BD Diesel Towmaster packages eliminate these known failure points with hardened billet components and enhanced friction capacity.

The most common mechanical issue plaguing the AS69RC is severe spline tooth wear on the factory K2 hub, along with ring groove failure on the stock cast K3 clutch drum. When towing heavy or running increased engine output, these stock components experience premature fatigue, causing slip, harsh engagements, or catastrophic clutch failure. BD Diesel cures these flaws by installing an exclusive nitride-coated billet K2 hub alongside a reinforced billet K3 drum, ensuring the geartrain withstands continuous high-torque cycles.

To keep power firmly planted to the pavement, BD increases clutch counts in the critical K2 (+33%), K3 (+40%), and B1 (+20%) packs, utilizing custom-selected friction plates that preserve smooth, positive shifts. Hydraulic holding force is elevated up to 300 PSI max line pressure via an upgraded valve body regulator spring. Every Towmaster transmission comes equipped with a cast aluminum deep-sump oil pan adding 3.5 quarts of fluid, leak-resistant nitrile rubber gaskets, and a matching ProForce multi-disc torque converter.

  • K2 Hub Spline Stripping

    OEM K2 clutch hubs suffer from severe spline tooth wear under load, resulting in slipping, metal contamination, and eventual loss of forward drive gears.

    The BD Difference

    BD equips each build with an exclusive nitride-coated billet K2 hub engineered to resist spline wear under severe duty.

  • K3 Drum Ring Groove Failure

    Factory cast K3 drums crack or fatigue around the seal ring grooves, causing severe hydraulic pressure drops, clutch burn, and shift flare.

    The BD Difference

    BD utilizes a heavy-duty billet 4140 K3 drum that reinforces ring grooves and accommodates a 40 percent larger clutch pack.

  • Transmission Overheating Under Load

    Heavy towing quickly overwhelms factory transmission fluid volume; the BD deep pan adds 3.5 quarts for significantly improved cooling.

    The BD Difference

    BD includes a deep sump aluminum pan that adds 3.5 quarts of fluid capacity.

  • Fluid Leaks from Cork Gaskets

    Stock pan and PTO cover cork gaskets become brittle and leak over time, a problem solved by BD's durable molded nitrile rubber gaskets.

    The BD Difference

    BD seals the pan and PTO cover with durable molded nitrile rubber gaskets.

What makes the BD Diesel AS69RC Towmaster different from a stock rebuild?

The Towmaster addresses known OEM structural failures by incorporating a proprietary billet nitride-coated K2 hub and billet K3 drum. It also expands clutch capacity across the K2, K3, and B1 packs, boosts valve body mainline pressure up to 300 PSI, adds a 3.5-quart deep aluminum pan, and includes an upgraded ProForce torque converter.

What torque converter is included with the Towmaster transmission package?

Each AS69RC Towmaster package includes an OE-style ProForce multi-disc torque converter featuring three friction plates, three steel reaction plates, and an upgraded heavy-duty stator sprag to prevent slipping under heavy load.

How does the BD deep pan improve transmission longevity?

The BD deep sump transmission pan increases fluid capacity by 3.5 quarts. This extra volume lowers operating temperatures, extends fluid life, and features durable nitrile rubber gaskets to prevent oil leaks common with stock cork gaskets.

What is the core charge policy for the AS69RC Towmaster?

BD Diesel AS69RC Towmaster units require a core deposit at purchase, which is refunded upon receipt and inspection of an acceptable, rebuildable OEM AS69RC core. Check the specific product listing for complete core return requirements.

Does the Towmaster package work with power take-off (PTO) units?

Yes, BD Diesel offers dedicated AS69RC Towmaster models designed specifically for trucks with PTO equipment, including left-hand PTO provisions for commercial chassis-cab applications. Verify your specific PTO orientation prior to ordering.

Are additional cooling upgrades recommended with this transmission?

For optimal thermal management and fluid flow, BD recommends pairing your Towmaster transmission with the BD Cooler Bypass Delete (part #1061528) and performing routine servicing with the Transmission Filter Service Kit (part #1064048).