It's usually 3/8-16 for the bell housing and 7/16-14 for the tailshaft mount.
There are numerous bolt sizes used on the transmission.
5/8
That would be the 4L80E transmission.
8mm-10mm typically
What size bolt for a 2005 Honda civic DX power steering tank bracket..
it is the same size of the bolt same as the hole and thread. the higher the grade of the bolt the more touque you can apply.
13 mm
The motor mount bolt size for a 1996 Windstar 3.8 is cross-thread a 3/8" bolt. That is the only bolts that will fit.
Th700-r4
A 3/8" Allen wrench will remove that bolt on the front caliper.
14 mm