Monster Transmission Blog: Transmission Tech, Upgrades & How-To Content

6L80E Torque Converter Shudder: Causes, Fixes, and Upgrades If you’ve spent any time behind the wheel of a vehicle equipped with a 6L80E transmission, you know how smooth these units can feel when everything is working right. But one of the most common complaints we hear from customers is a...

Common Problems and Solutions for the Dodge 66RFE Transmission In over 20 years of building, rebuilding, and diagnosing transmissions at Monster Transmission, we’ve seen the good, the bad, and the ugly. One unit that shows up in our benches frequently—but doesn’t always get the credit it deserves—is the 66RFE. While...

Aisin AS69RC vs. 68RFE: Which Transmission Do You Have? If you own a heavy-duty Ram truck with a 6.7L Cummins diesel, chances are you’ve heard about the ongoing debate: the Aisin AS69RC versus the 68RFE. Both transmissions have their strengths and weaknesses, and both have their place in Ram’s lineup....

Common Problems and Solutions for the Aisin AS69RC Transmission The Aisin AS69RC is one of the toughest heavy-duty transmissions available in modern Ram trucks, designed to handle extreme torque and heavy towing. You’ll find this transmission most commonly in 2013–2018 Ram 3500, 4500, and 5500 models equipped with the 6.7L...