4L60E Problems: No Reverse

One of the most common problems with the 4L60E is that the reverse gear will go out.  Having no reverse can be a tricky issue, especially if you happened to park against a wall.  Below we will cover the most common problems that cause reverse to fail.     4L60E No Reverse Causes Low Reverse … Read more

4T65E Problems

The 4T65E is for the most part a fairly reliable transmission.  It is the successor to the 4T60E.  Variations of this transmission have been common since the 1980’s.  By the 2000’s most of the kinks were worked out.  But, like everything else, it’ll break and wear out with mileage and time.  So without further fanfare, … Read more

4L60E Transmission Problems

The 4L60E transmission is the direct descendent of the 700R4, and as such already had over a decade of refinement put into it before it ever even made it into production.  This means that even the early ones were pretty good from day one of their production life.  While there have been many case changes … Read more

4L80E Transmission Problems  

The 4L80E Transmission is a fully computer controlled transmission that comes bolted to the higher horsepower and torque trucks.  It is the overdrive successor to the 3L80(better known as the TH400 for most of it’s life).  It is significantly larger than the 4L60E and if you compare the cases side by side it makes the … Read more