Hey guys
I am relatively inexperienced when it comes to transmissions. I have a 4l60E and I just had it installed. It was used. Well it began to leak slowly a couple days after I had it installed. What are possible causes of this? I had it put in cheap so pretty sure they just took the tranny I had shipped to them(used with 70k on it) and stuck it in my car. They didnt flush and fill or anything like that. Any ideas?

Thanks

Leak is coming from the Tranny Pan area or somewhere nearby.