automatic trans drain plug

[eddy]

I was doing my oil change and relized when I looked over at the tranny pan.It has a weird plug.I went on to finish the oil change meaning to have a better look at the drain plug on the tranny but my kids came out to help and I forgot.now does anybody know what I need to remove this plug I want to do a tranny fluid change in june any help would be great (have a 2010 4dr)

[CTScott]

It's a 10mm Allen wrench, but I found that a 3/8" works fine.

[WeeYari]

I want to do a tranny fluid change in june any help would be great (have a 2010 4dr)

Why?

[eddy]

because for the first time in about 7yrs I have somewere to work on my car myself