iv been trying to get 2 bolts(i got the 3rd one) out that mounts the shifter pad to the side of the 4 speed trans thay are counter sunk and cone shaped so it cant really get anything like wd or anything like that to the threads(iv tried)
i took a lil bottle torch and got the bolt as hot as i could(as hot as it was gonna get) and hit the bolts with a punch bunch of times to try to break it loose no luck all im doing is twisting the allen wrench and when i quit it started to strip the allen hole soooo what if i took a sledge hammer to the alum pad and tried to break the pad off around the bolts(i dont need the pad) or will i break the tail shaft housing?
i dont have a cutting torch and there is no way to get any kind of penatrating fluid to the threads i think if i used a easy out it will snap off so what the heck????
the one bolt i got out you can see lil dab of blue locktite on the threads did the factory do that? anyone else have this problem??
ralph besides making up new bad words(i already know all the old bad words) has not been good day
ralph

If you have an iar chisel you can dig it into the face of the bolt and chisel it around counter clockwise. Iv'e had that happen to me before. If you dont have an iar chisel, A hand chisel will break it loose.

Tranny in the car or out?

You may be able to lower the tranny enough to drill the heads out and then remove the left over stud with Vise Gripes.

I had good luck with one of those hand held hammer impact tools and a good solid allen tip. (this guy http://www.kk.org/cooltools/archives/000723.php )

Good news is if you get one more you may be able to hammer plate and rotate it to help remove the third.

I would be cautious trying to break the plate. The tail is cast and will be brittle. No matter how much you think the cast iron will NOT break before the aluminum plate this will be the time it does.

Take a 3" cutoff wheel and cut a slot into the head. Then try a screwdriver. If that doesn't work cut the plate away until there are two parts that you can grab with vise grips. You can also drill and use an easy-out or weld a regular bolt head or nut to the bolt.

Always used a 3/8 drive impact and a allen head adapror.Heated the mounting bosses on the transmission extension behind the mount,never had on I couldn't get apart.

the trans is out of the car and the bolts are countersunk pretty deep no way of welding anything to the bolt head or cutting a slot into the head with the plate in the way that is also the reason wd40(or anything else) wont get to the threads

I can't count the number of those I've had to drill out.

If you don't have an impact that you can use with the allen wrench then weld a nut to the screw. I know it's countersunk and tight. That's why I suggest a nut. You can weld the inside of the nut to the screw. It deosn't have to be a hold-together-forever weld. You'll never get the tip of the gun in the nut but you can stick the wire out a little more than usual.

I would weld a hex bit or even a small diameter socket to the head of the bolt.

the bolt does have a locking material on the threads but what is holding it is the bolt being stuck in the alum pad, GALVANIC(sp?) corrision , same thing happens to the altenator , the steel in the alum .

Drill the head of the bolts off , go to the hardware store and get new flathead screws , install with loctite and antisieze compound on the part of the screw that sits in the alum .

I think I used Aero Kroil or PB blaster and let it sit for a few days and repeated...
They were a problem....I was very happy when I got them out.
The alum plate is repoped but costs a few bucks..
maybe try a slightly larger metric allen wrench and hammer it into the head a bit...
Or just drill the head off the bolt and save the alum plate...

I have done it the way you thought of in your first post: break the aluminum mount off with a hammer and then take the bolts out with a vise grip. It worked great for me. It didn't hurt the tailshaft housing at all.

i got a easyout today but i havent tried it yet

Get some reverse drill bits.. Might back out while you drill..

Since the transmission is out of the car, just drill the heads with a 5/16" drill bit until the bolt head pops off. Then the treaded part will unscrew easily out of the trans. Buy new bolts and you're in business.