Well then he's asking for it. People have been blowing these things up for 50 years, at least. If you haven't gotten the memo by now, it's hard to feel bad for you when you shell one.

Yikes, would be a good time to list the parts needed to prevent this

Low band apply valve body.
Billet steel drum.
Bolt in sprag.

At least I hope that will, that's what I have.

i went with aluminum drum to prevent this!

Im going to stir the pot. Build a power glide using all the correct race parts. Problem solved.

That was my choice. I lost some ET but its way more consistent, cheaper, more options, and safer. I've since recovered most of the lost ET so its a win win.

I NEED a three speed, and it's a three speed 727 that blew up...info to help those of us running a 727 would be appreciated.
Thanks.

I saw a guy blow up a 727 in a 340 Barracuda dialed 13:70. Had a Cheetah with no LBA and no blanket. His trans builder had tried go talk him into a billet drum and a blanmet, but he claimed he couldn't afford it. When it blew up it broke his foot and he was off work over a month.

727 is no place to be "frugal", especially when good parts aren't that expensive.

The parts you mentioned are a good start. I replaced rollers and springs regularly as well.

Anything happens to the rear, driveshaft, spin the tires hard or anything like that, get the trans out and look at the roller clutch.

Put it in second before you even go into the water box.

I am going to call the builder of the trans that's in my 10.0 street Barracuda and find out whats in it.

You brought up a very good point about spinning hard. With radials now becoming so popular they either bite, or they don't. My Friend picked up .20 on radials a few weeks ago BUT during our Halloween Race I don't know what happened but he spun like a mad man during one time trial. And our track is known for good traction. If it was a 727 instead of a powerglide major damage could have happened inside the transmission.

Had a friends 1965 Belvedere puke its 727 on the street earlier this year. Could have been worse.

How hard was he spinning? I don’t have anything with a 727 in it now but you guys have me absolutely terrified. After reading this I wouldn’t want to do a burnout or burn rubber with one. I knew there were nono’s but I’d be really fun shy to have any fun lol

Don't worry.... the resident "I've used stock drums forever and everyone's doing it wrong...." will check In and make you feel all better again.

We learned all about this ordeal back in the pre internet days. 10 sec car, launched, broke rear gear, shocked sprag, and away she went. All 727's we've run since have had billet drums and blanket since witnessing this. For the price of the drum vs the possible damage it's a no brainer.

put a turbo 400 in it or powerglide,get away from a 727

Btw.... 904 trans doesn't have the mass of the 727. No worries there

Thank god he is ok. Cars can be replaced but we cant. Ron

Spin and shake will screw up ALL automatics. Every T/D and T/S guy I know has a spare glide or 400 or Lenco. Most Powerglide users I know have at least two others laying around. Buddy of mine running Super E back in the 90's went through at least two glides every race! Built right, used and maintained correctly, a 727 should handle any of our 6-900hp engines. I do have a picture of my buddy's '63 Belvedere that looks like it ran over a deer on the starting line. CSR shield barely dented the floor. There wasn't a piece bigger than your fist left. I'll try to find it and post it.

You should have posters made of all the 727 failures due to stock parts in high hp cars and hang them in your shop, I saved these pics on this thred and have some others i found.

Very easy. If it bothers you install a good aftermarket front drum. Problem solved. I personally have never hurt a drum, seen a few for sure. All the valve bodys and good low rollers mean nothing if they fail to hold and the drum and it over speeds. A stock drum may break at 10,000,12000, 15000 rpm? You don't know. If the low roller lets go it's engine RPM x 2.28 = drum rpm. Do the math. Goes without saying they should all have a shield/blanket/SFI case, your choice.
Doug