is there a way to change all the fluid in the trans(including the torque converter) without using a trans flushing machine

 

Yes..it's called a running engine flush.

They disconnect a tube from the front of the car somewhere and unplug the tranny drain.

They leave the car running while adding new cans of fluid..maybe 3-4 cans. and let that drain out again. this all happens continuously..you could go for 20 cans if you wanted.

Then just stop the car and refill.

 

thanks for the info, i'll do that tomorrow!