Replacing the clutches in an automatic transmission is not a job that is easily done whatsoever. Nearly everyone is going to have to take it on in for a rebuild. There is a giant rubber O-ring around the piston that will shrink due to heat and age. And, the 3-4 clutch pack is done in by the 3-4 piston. This is caused by a burned out 3-4 clutch pack. Good thing these engines have rev limiters! It can be a pretty scary feeling. The engine is usually under a pretty heavy load at the time, so it’ll tend to redline before you realize what happened. The vehicle will shift from 1’st gear to second gear with absolutely no issue whatsoever, but than it acts like it has shifted to neutral. This is one of the most common problems with the 4L60E. 4L60E goes into neutral when shifting into third gear Common 4L60E Problemsīelow is a list of some of the most common issues with the 4L60E. Make sure you aren’t confusing the shutter of a poor running engine with the vibration of a transmission with a loose converter. That is either the torque converter or harmonic balancer. For instance, maybe you’ll feel a shutter from 1800-2000 rpm, but the engine will be fine above or below this range. You’ll probably find that you’ll get this feeling at particular rpm ranges. If you find that your vehicle is vibrating at highway speed, this is often caused by a loose torque converter. If it isn’t an electronic issue causing limp mode, it’ll be a mechanical one. It’s way more likely that this has happened than you have a major issue. The first thing that I would check is whether or not is is getting power from the ECM, and whether it is sending a signal back to it. If the 4L60E is not shifting through the gears like it should be and the service engine soon light comes on than you’ve probably entered limp mode, limp mode is gear 2, 3, and reverse. This is a good writeup on taking care of a tow vehicle Here is a good write up on low transmission fluid signs. So if your 4L60E is acting funny after you’ve done one of these things, why don’t you just go ahead and change the fluid just to be safe. This is especially true if you’ve recently towed something or been racing. So before you go crazy thinking about what part may be giving you a difficult time, try making sure that the fluid isn’t the culprit. Tranny fluid is one of the most neglected items of vehicle maintenance. Motor oil is only responsible for lubrication and cooling and is changed way more than transmission fluid.
There is fluid that goes through the 4L60E that has three jobs: It is important to understand a few things about how an automatic transmission works. If you don’t find what you are looking for, here are a couple of good resources that may help:ĤL60E Shift Solenoid Symptoms and Diagnosis
4L60E SERVO ASSEMBLY DIAGRAM HOW TO
Lets get into 4L60E problems and how to troubleshoot them. While there have been many case changes and internal changes throughout the years. This means that even the early ones were pretty good from day one of their production life. 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.
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