[Solved] 4L60e Lost All Gears

Has your 4L60-E lost all gears? Is this because of any leakage? Have you built the transmission yourself and missed something? What could be the possible causes for 4L60-E losing its gears?

If you are looking for answers to the above questions, you have reached the right place.

The most common issues that lead to 4L60-E losing all its gears are a broken Torque Converter, Loss of Transmission fluid, and Pump failure.


Let’s look at the common problems briefly:

What causes a 4L60-E to lose all gears?

  • The first thing would be to look for any leakages because when the transmission fluid is absent, it could result in the transmission losing all its gears.
  • The next most likely reason could be the torque converter. It could have broken or been wrongly set.
  • The third most probable reason could be pump failure.


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My 4L60-E transmission lost all gears while driving. What should I do?

You are cruising on a highway and suddenly your engine is free-revving as if it were in neutral. Eventually, you are stuck!

The most obvious thing would be to check for any leakages first. If there is a leakage, then you know what exactly is the issue.

Tow your car to the garage, check the pump, and the torque converter to see what is causing the problem.

  • If the pump is failed, then there is no other option than to change it.
  • If the torque converter is the culprit, check if it is set properly with respect to the flywheel. However, if it is broken, you would have to replace it with a new one


My 4L60-E lost all gears when hot. What should I do?

You must be having one of these problems:

  • Loss of transmission fluid: When the transmission gets hot, it needs transmission fluid to cool down so that it can work efficiently. Check for any leakages and fix them at once. Refill with new transmission fluid.


  • Blocked/Clogged transmission filter: Due to a blocked filter, the transmission fluid could not flow through the components. Replace the old filter with a new one, service the transmission, and you should be fine.


  • Gear slippage: Using a vehicle with old/burnt fluid or with less fluid can cause the components to wear out which causes the issue of gear slippage. Change the fluid and check, if it is still the same, replace the clutch plates with new ones.


  • Faulty Transmission cable: In this, the clutch disk is not able to separate from the flywheel due to which changing of the gears does not work. You should get the transmission cable fixed/replaced to counter this issue.



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My 4L60-E lost all forward gears. What could be the problem?

If the reverse gear engages normally, the torque converter, pump, input, and output shafts should be fine. The problem most likely could be in the clutch circuit, sprag assembly, snap rings, or the valve body.

Inspection of each trans component must be done before rebuilding the transmission. Debris must be removed, valve body and the torque converter should be disassembled and cleaned thoroughly.




It could be terrible to lose all the gears, especially while you are driving. You should take this problem seriously as it could lead to other transmission problems if not addressed in the correct way. Do not look for temporary solutions and clean the transmission when you rebuild it.

This article provides precise solutions to all the issues related to the 4L60-E losing its gears. You should have no problems if you rebuild the transmission keeping all the pointers mentioned in this article in mind.