Does anyone know the size of shift knobs I need to look for in order to replace the factory one on my automatic scion tc? I've been to autozone, and the ones they have there seemed a lot bigger than the stick on my tc when i screw off the factory.

auto- 8mm
manual- 12mm

does that mean i could just get any aftermarket shift knobs and screw them on as long as they're specified at 8mm? sorry, don't know too much about cars.

NO, they have to be 8mm AND be for an automatic...

oh, and you cant get the ones that have an overdrive button on it, for example-
http://www.autogiga.com/pictures/product/incar/shift%20knob/lv-455lg.jpg

These are all accpetable-
http://www.autogiga.com/pictures/product/incar/shift%20knob/ra70-b01.jpg
http://www.autogiga.com/pictures/product/incar/shift%20knob/ra89-b01.jpg
http://www.autogiga.com/pictures/product/incar/shift%20knob/ra94-b01.jpg
http://www.autogiga.com/pictures/product/incar/shift%20knob/ra107-b01.jpg
http://www.autogiga.com/pictures/product/incar/shift%20knob/ra118-b01.jpg
etc...

those are some sick knobs, which one are the second and third one i never seen them before.

RAZO

ok i found them at the website you leech the picture from but they don't let me buy lol. And all of those would fit auto like you said right? just take the oem shift out?

lol as long as its for an auto and its size is 8mm, i dont see why not...

check out this thread for more pics
http://www.scionlife.com/forums/viewtopic.php?t=49263

heres a pic of the one you want
http://i208.photobucket.com/albums/bb137/vang2k/IMG_3074.jpg
http://i208.photobucket.com/albums/bb137/vang2k/IMG_3073.jpg
http://i208.photobucket.com/albums/bb137/vang2k/IMG_3080.jpg

awesome guys, thanks a lot for the replies =)

I believe Dr. Isotop does knobs for Auto's too!...and he does some AWESOME craftsmanship too!!!