it looks like it leaking where the back half bolts up. its barley leaking like 4 lil drops over a night but i wana fix it

 

You have to figure out if it's coming from the output seal (is it coming out of where the driveshaft yolk goes into the trans? Or if it's actually the back half of the tranny that is leaking. If it's the back half you'll have to pull the trans, clean up the surfaces and RTV it again.