#1999 4l60e shift kit how to#

If you need to replace your shift solenoids, they are a pretty straightforward piece to remove and install. The image below shows how easily accessible the shift solenoids are once the pan and filter are removed. On a 4l60e, the shift solenoids are located on the rearward end of the transmission against where the pan bolts to the case. The computer is telling the transmission to do one thing, but mechanically it’s doing its own thing in regards to gear selection. Another thing that might happen is that the transmission will try to hunt or find the correct gear to be in. Delayed or Inconsistent Shifts – If your shift solenoids are failing, you may quickly notice that the transmission will start to shift in a very inconsistent and delayed manner.This gives the infamous “6 neutrals” that the 4l60e sometimes gets. Transmission Won’t Shift Out Of Neutral – When a shift solenoid fails, the transmission won’t be able to shift into any gear.When the computer commands a downshift, fluid is routed through the solenoids, so if a solenoid is stuck, it is not able to effectively move transmission fluid which results in the transmission staying in the same gear. Failure To Down Shift – If a shift solenoid isn’t downshifting from one gear to another, you may be facing an issue of a shift solenoid being stuck open or closed.The best way to make sure that your shift solenoids are the root cause is to test them.Ĭommon shift solenoid failure or symptoms of a bad shift solenoid include:

Common issues that may cause you to believe the 1-2 or 2-3 shift solenoids are failing are a bad accumulator, stuck shift valve, just to name a few. While 4l60e shift solenoids do go bad, it’s not a common occurrence. When assessing a shift solenoid issue, there can be a number of things to consider.

#1999 4l60e shift kit how to#

In addition to that, if you discover the shift solenoids are the culprit of your issues, they are inexpensive to purchase and repair yourself if you have the skills and understanding of how to do so. Luckily, it is pretty straight forward testing and replacing (if need be) 4l60e shift solenoids. Your transmission will display a variety of symptoms, but sometimes these issues can be confused by other common 4l60e issues. However, when they go bad, you will notice very quickly. There are 2 shift solenoids in a 4l60e (1-2 and 2-3), and both control up and downshifts with fluid passing through them when commanded to do so by the computer. When your 4l60e starts to act up and not shift correctly, one very likely culprit is the shift solenoids.