I want to know if simple green is safe to use on rc cars 100% except electronics. I hear people talking about using it but just want to know if there is anywhere you should aviod using it. Would it be safe to use inside tranny and diff to clean their?

check jato thread for your answer

Its just a degreasing agent it should be fine. I hear alot of people use it. I would use it too, but I dont have any lying around . I use it all the time at work though cleans off any gunk.

I use it also, I use 100 percent to get off heavy gunk. Other wise I use 50 percent simple green and 50 percent denatured alcohol. The alcohol allows it to dry up no matter what, and with that mixture I havent had a problem spraying it on electronics.