I cant find a trans fluid leak on a C4. When i was driving the other day trans fluid started to hit the exhaust and even left a trail on the ground. I put more fluid in started the car on ramps and couldnt find the leak. I tightened the pan bolts and checked the lines. I put the car back on the ground and a few drops hit the ground but i couldn't see from where. Any ideas?? Should i drive the car and see if the pressure makes it leak??