There ar 2 metal lines just above this dipstick tube seal, they are famos for leaking and the fluid runs down and APPEAEARS to be coming from the tube seal! Look closely again to see if this is the case here!! There is no reason for the tube seal to just start leaking, NO fluid pressure there! I thought the same thing as you on the first one i fixed,,, It was a cracked line. Fixed a few since then too, same thing! Check fluid level before driving. Post results for more repair info.