Trans line leak

[Bertram65]

I have a leak at one of the fittings on one of the trans cooling lines. It is in the driver side wheel well on top of the frame in front of the spring. The fitting does not appear to have a threaded connection more one end slides inside the other and a piece goes over the two holding them together. I had a trans line TSB done a couple months ago, I do not know what they changed, it is listed as C44 on my invoice, they did it while I was having a U joint replaced under warrantee. Has anyone seen this before? Not sure if I have to take it back to the dealer or if I can fix it myself.