Transmission

I have a transmission fluid change question. My trans has about 200,000 miles now and it is an automatic. I gotten it used with 100,000 miles. I have changed the fluid once in between the two mileages and i have been told if i flush it it will damage it causing it to fail. Can is do a simple fluid change and filter for an automatic with this amount of mileage or should i continue to drive it with the fluid in it now until it goes?

Drop the pan and change the filter, no need for anything more.

Change the fluid and the screen. Don’t flush anything in your car.