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Hi all. this is a weird one so I thought I would share. On my 96 Deville. 199000 miles. A few years ago my transmission fluid was over for no appearant reason. looked completely normal but over. So I pulled out fluid back to normal level. probably around 1.5 quarts. all was good. now about a month ago I started having tcc issues. The service trans light would come on only if I was cruising and accelerated. basically TCC was not unlocking fast enough therefore throwing the light. P0741. I have been tapping the brake before I accelerate and the problem doesnt occur so the light has been out. Well tonight I decided to check my trans fluid just for the heck of it, and again the fluid was over. When it was cold the fluid was up to the hot max line. I pulled about 1.5 quarts again and back to normal level. Well I drove it home tonight and all seems back to normal. I tried many times to get the tcc problem to occur but all the way home it just worked perfect, as soon as I hit the accelerator it sped right up with no problem. Light never came on once. I understand that coolant can leak into the trans by the cooler in the radiator but honestly I have checked the fluid and both times it was over the fluid looked perfectly normal. as does the coolant. I change the coolant every 2 years. If there was fluid contamination wouldnt I have noticed by now? Should be obvious somewhere. If there is coolant in the trans would the trans fluid be on top of the coolant? and that is why when I pull fluid it looks normal. Now keep in mind I drive this car every day and I do not baby it. I drive highway and city with no problems other than the recent TCC problem. shifting is perfect. not harsh at all. If it did have coolant in it how would it have lasted this long? this is a weird one so I thought I would share. maybe I wont be the only one scratching my head