2004 sebring lxi 2.7L V6, engine revs when slowing down at stops, when automatic transmission downshifting. what are some causes of this?

Sounds like you might have a v6 engine. The only solution to this one is to replace the transmission. Google the car there is nothing but problems with the v6 transmissions if left unfixed it will leave u stranded be carefull

CK TRANSMISSION FLUID

You are experiencing first stages of trans failure, and the 4l60 has a few

I have one that does exactly this. I have confirmed no codes in trans or engine; I have watched the data on the scan tool and it appears that the PCM is choosing to shift without a change in throttle or speed to cause it. I am looking into a new PCM - ouch!

Changing the fluild ( all of it) might fix it if your lucky. Something overheating sounds possible. Any cooling system problem can cause this and cleaning the cooling system and flushing out the transmission cooler in the raditor may go a long way towards fixing your problem. dity raditor and or coolant will cause this problem. I you clean everything real good and then go and drive it and it goes longer but still does it your in for another rebuild. this time put in a new raditor to make sure the transmission lasted as long as it's supposed to. It's possible the throttle pressure was'nt set right and the trans upshifts too early and therefore the transmission gets too hot cause the engine is going too slow to make good transmission pressure and the slipping transmission overheats. again even after corrected it'll still do it as the transmission internal seals are adamaged by heat and it'll need to be rebuilt again.

The transmission goes in the tranny housing under the engine. Is this your question? I wasn't quite sure.

Check all the wiring from the vehicle speed sensor (VSS) to the ECM, including all connectors. It seems that there may be an intermittent open (or short) causing the ECM to sense the vehicle slowing down/stopping.

As it should. Lower gear means higher engine revs.

Warning - downshift at too high a speed will cause damage to your engine and transmission.

Why are you dong this anyway? Saving the brakes? Pads are about $30.00 and should last 30 - 40 thousand miles. Downshifting puts unnecessary strain on your entire vehicle, even though it might be fun. It also increases fuel consumption and is hard on the tires.

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ok this sounds easy when you ran the vehicle the computer controled the idiling motor now that you replace the idiling motor the computer hasnt been reset to except the new parameters
once you reset computer this should bring the idle back down to its specified idle
you can also adjust back of gas pedel the idle cable and on the throttle body by the idling screw

make sure the idle motor is conected