you need a 3/4 impact air tool with a big tank, so you can hold it on for a while before it looses pressure and needs to build back up. thats the only way.

 

dude, you can't just put it in 5th gear and try to spin it.

Someone has to be inside the car STANDING on the brakes. If you don't have the brakes hooked up and are just trying to leave it in 5th to break it loose, of course the crank is still going to spin!

If you find a way to secure the crank, you'll be able to break the bolt loose.

 

someone was standing on the breaks it was still spinning

 

then something isn't right.

You might want to consider figuring out how to jam the axles so they won't spin, because I can tell ya, only a very powerful air gun will work.

 

use a chain wrench as a hold back then heat it up give it a few good wacks with a 5pd sledge then try to loosen it....works for me almost everytime.....g/l

 

thanks im gonna go pull off the flywheel ins. plate and jam the fly now and see if that will hold.

 

whoa holdup, now you're gonna drop the trans out so you can get to the flywheel and jam it?

 

no there is a fly wheel cover on the bottom of the motor i was going to drop but 2 screws are stripped.so now am screwed.
so far i have tried
5th gear someone holding the brake
a corded impact gun with about 250 ft-lbs
i am out of ideas with everything i try the pully still spins.i think the key is on the pully is either stripped or missing

 

what part of tampa are you in? if you want i could come out and try to figure something out. PM me

 

told ya the electric impact wasn't gonna work. Those things aren't up to the task of crank bolts.

gotta find a way to stop the wheels from turning. Your brakes should be holding it....maybe drop it on the ground, let the tires sit on the ground?