I mix up around 70% acetone to 30% atf......... you don't need much, i.e. 100ml total will do lots of jobs.
After awhile the atf stays dissolved for some reason, has to be shaken at first.
Last time I used it was on a completely seized, rusted track rod thread that no amount of heat or persuasion would move. 5 mins and all easy.
cheers, DL
