If you do not provide even support across the pan

With and auto trans and in particular the 4L60E there is no such thing as low. Adding one quart over after hitting the full line did not seem to have any notable effect. Jumping from very low to beyond the max of our 300 PSI gauges. If you do not provide even support across the pan again you can bend the pan and damage the filter causing the same set of symptoms. All transmission should always be kept at the top of the crosshatch level warm running in park or neutral. At the same time if you place a filter thats too tall for your pan combination it will crack in the neck area and again cause the symptom of low fluid. We recently did some intentional test with a unit we use to check different ideas. With the resulting crazy pressure readings and the extremely high fluid this occurred because the internal rotational assemblies in the transmission were acting a lot like a blender and churning air into the fluid more rapidly than it could bubble out. So always make sure you are using the correct type filter for the pan you are installing. Still others use the deep filter like goes in the truck 4L60E. In the case of the low pressure the result would be obvious burned frictions however at the same time the pressure spikes could just as easily break parts, push out snap rings etc causing serious damage and or sudden failures. There is no such thing as a little low. When you changed gears particularly on the 2-3 3-4 and the reverse gears this condition became worse. The air created in the low fluid scenario is a result of the filter becoming uncovered press filter cloth wholesales and the pump pulling air into the system. Ideally I wish there was a way to assure the transmission fluid was equal to the pan rail level in gear running . True the little seal feels tight holding it in the pump but it can work its way out and drop into the pan when used this way. I could easily see how after doing these test you could do a lot of damage to your transmission even this small amount low.Now in a past test several years ago I did a similar test going in the other direction too much fluid. But I do understand why they dont have you checking it that way Another thing that should be addressed is aftermarket and stock deep pans.. I thought I would mention this because we have run into this with some of our own customers changing pans and not being aware of the filter differences and requirements. The pressure in this condition was completely unstable. Always carefully read the pan manufacturers instructions. You cannot have stable hydraulic pressure with air in the fluid. A little low means you just took years off the life of your transmission or even killed it right now. If you for instance use a deep pan with the wrong filter bear in mind GM actually used the bottom of the pan to hold the filter up in place. Here is what we found, At 1/2 quart low approximately 1/2 inch bellow pan rail we ran the transmission. Also note when installing a transmission. If you let the trans get even 1/2 quart low you will and or have damaged your transmission. They are absolutely not forgiving. We monitored pressure. Some aftermarket pans while deep do not require a deep filter.Information concerning fluid levelsFluid level is spoken about often here are the facts.The Point on this is fluid level is imperatively important with and auto. However adding two quarts over the trans began again to have pressures resembling the low fluid scenario the pressure dropped and spiked erratically and of course the fluid began quickly to resemble the appearance of the low fluid trans lots of air bubbles and since a trans is not so different from a brake system the result was similar. While regardless of the pan type the dip stick will still read the level correctly. This will result in the transmission acting like its low on fluid even when its not. Others require and extension. Here is what happened there, this was however unlike the first test with a 4l60e it was a 700r4 though would imagine the results would be similar
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