4t45e Torque Converter Not Staying Locked

[sparkplug]

I don't have a way to checking the temperature. Will a code scanner be able to check the temperature?

[robertisaar]

don't suppose you have a way of monitoring trans temp?

it sounds like the normal PCM unlocking of the TCC due to high temps, if so, pipe in an auxiliary trans cooler.

[sparkplug]

Well if you read my last thread about my oil pressure gauge and the spinning of a bearing I have an 05 LA1 in my 03 Grand Am GT. So after the swap I noticed that my torque converter will not stay locked. When I drive it first in the morning it will shift fine and lock up. Then after a few minutes it unlocks and rpms go up. After a while it will lock but unlock again. Fluid level is ok, it's not brown or burnt. I have 94000 on the tranny. Can anyone tell me what the hell is going on here? I heard there was a PCM flash to correct this.