Supplement on removing a flywheel:
There are a few ways to get an automatic or manual flywheel on or off.
The easiest by far is to have an impact gun. A quick ziiiip and the flywheel is on the ground. If you don't have an impact gun the flywheel will spin as you try to take it off, you can attempt to brace the flywheel using screwdrivers and such, while holding the crank pulley with a 27mm socket.... or you can use this secret:
EASY WAY TO GET ON AND OFF A FLYWHEEL: upon doing a clutch swap a year or so after my 5 speed conversion, I ran into a really easy way to change the flywheel. Basically you get a new bolt (and possibly a nut since the a/t flywheel isn't threaded) that will fit into a hole on the flywheel (the hole not used to bolt to the crankshaft) and use a bellhousing bolt. Run a chain between the two bolts as shown in the diagram below. it doesn't matter if the chain is too long, the excess can just dangle. Put the chain on and then turn the flywheel to add tension to the chain. The chain will now keep the flywheel from spinning. This works great to hold the flywheel if you don't have an impact gun. Wrench away.