One of the most common (and most frustrating) problems that happens to the 4L80E is when it loses 3rd and 4th gear at the same time. This leaves you driving around a car or truck that screams down the road. So, what causes the no 3rd gear or 4th gear problem? Below are some common … Read more
Clearly, the biggest difference between the TH400 vs 4L80E is the 4L80E’s overdrive gear. Although they come from different eras, there is quite a bit that these two transmissions have in common. The mere fact that people are so interested in this topic is a testament to the absolute bulletproof reputation of the TH400. There … Read more
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