So im following instructions on replacing tranny fluid. I cannot get to the return line disconnect on tranny. The instructions say to use a couple of box wrenches to loosten the nut but for the life of me I can seem to get the wrench around the nut.. its way up there on the tranny and there is little to no room to get my hands up there. any other tools I can use or ideas you all have that can help me?

Thanks a lot

 

Whenever i have my fluid exchanged they always take the top line loose at the radiator.