tranny problems

[Power Ram Man]

my auto tranny original with over 200,000 miles on her is acting up she is going in and out of overdrive every three seconds and when i changed the fluid in the tranny pan there was brass on the bottom of the pan what could this mean?

[Rebel Ram]

I cannot speak to the brass in the pan but as a test for you OD you could temporarily do what I have done permanently. There is a two wire plug that goes to a sensor in the front steel line that runs to the heat exchanger. Unplug it and put a jumper in tha wire plug. If you OD works ok then it might be the sensor. Pressure switch I think.
Mine is gone because I had to make a new line. But my OD work's fine.

[JD730]

If you OD works ok then it might be the sensor. Pressure switch I think.

That switch is a temperature switch, it supposed to kick OD out when the temp is 260-270*F in the hot pipe leaving the trans.

The brass is probably one of the trust washers getting chewed up.

On the trans there is a 2 wire plug above and behind the shifter. One wire is fed 12v when the key is on and the other is grounded when the PCM calls for OD, I don't remember which color is which, but splice a wire in to the one that gets grounded and run it into the cab to a switch so you can manually control it. If it still acts up after that, then the problem is in the trans or valve body. If it doesn't act up, it most likely the Throttle Position Sensor acting up or dirty.