I purchased my 1st RV 3 weeks ago and have been going thru every system making repairs as needed. Most recently I looked at a tranny flush as rv has 78k on it, and i find no record of previous flushes. I inquired at several local shops about a flush and no one wanted to do it, So decided I would do it myself. Its a Ford 5r110w tran automatic. Followed flush procedure as described in several "you tube" vids. Replaced both the internal filter, and exterior cartridge filter. Buttoned things up and brought up fluid to cool mark on dip stik. Drove around several miles, everything looks good. Next day hooked up my boat to head for Lake Champlain for weekend. Only made it 30 miles- smell ATF fluid, pull over n look underneath, fluid spilling out of tran, made it back home ok, tran shifted fine and no slipping on hills. Appears fluid is coming out of vent tube on top of tranny- recheck fluid level - looks good! What is going on? What do I do?