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Discover the complete story of the 68RFE transmission—its origins, issues, and the proven upgrades from ATS Diesel. Learn about rebuild kits, valve bodies, torque converters, thermal bypass fixes, and the ultimate Allison conversion for 6.7L Cummins owners.

68RFE Transmission Overview: From its origins in 2007.5 to its infamous weaknesses and the proven solutions offered by ATS Diesel Performance, this article takes a deep dive into the history, issues, upgrades, and ultimate alternatives available for RAM Cummins owners. Whether you’re considering a rebuild, a valve body upgrade, or...

By Clint Cannon Read more

Choosing between the 68RFE, Aisin, and Allison transmissions for your Cummins? The ATS Allison swap delivers unmatched strength, drivability, and long-term reliability—making it the smartest upgrade for 6.7L RAM owners.

68RFE vs. Aisin vs. Allison: if you own a 6.7L Cummins, you’ve probably lived some of this debate firsthand. RAM trucks deliver monumental torque, but the transmissions bolted behind them haven’t always kept pace. After years of field data, customer builds, dyno sessions, and heavy towing, one answer rises above...

By Clint Cannon Read more
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