I am changing my transmition fluid in my 300D and draining the torque converter also. Had the new filter on and the new gasket on,everything back on. Started to put new fluid in, got about 4 quarts and I noticed a big leak. Thought it was the gasket, took the pan back off and put the old gasket back on. Started to put fluid in and started leaking again, it looks like it is comming from the top of the tranny. What am I doing wrong? I have a big mess to clean up and get somemore fluid.