6L80E Transmission Issues: Common Problems and Solutions The 6L80E transmission fills a much needed duty gap between the versatility of the 4L series and the Allison variety. All previous GM transmissions had been based on hydraulic controls with more electrical aspects with each upgrade, but this unit was developed as a...

68RFE Transmission Issues: Common Problems and How to Fix Them The 68RFE transmission was introduced in 2007 with the Ram and Pickup Lines, having the benefit of modified internal components to handle increased torque and revised gear ratios for larger applications. Monster provides a wide variety of builds for this...

4L60E Transmission Common Problems Beginning in the late 90s and the early 2000s, GM began to phase in a new variant on the 4L60E, the 4L65E. This transmission introduced a new set of 5-pinion planetary gears as well as a newly improved and stronger output shaft. This gave the transmission...