I know some on here dont like the CSR shields, but I liked it on the charger, yeah things got a touch tight, but nothing super difficult. We used a billet front drum, and bolt in sprag as well for extra insurance.

Sound to me like the floor did the job, not the shield.

There were no holes through the floor, so the shield did it's job. When the trans exploded, there wasn't much to hold the shield to it. It blew upwards into the floor, deflecting the shrapnel.
The shield was still in one piece, but it was very damaged. A blanket couldn't have done any better.

Options are limited if you have a car quicker than 10.0 and don't want to cut up the tans tunnel/firewall.

Why do people think the bolt in sprag is an upgrade?

It was originally designed as a "case saver" for cases where the OE sprag wasn't a press fit anymore, was it not?

If you are building a racecar I believe in doing whatever it takes to be a good piece. If it's getting a cage, suspension, etc why people don't do other items at the same time? I this case making the tunnel larger. It makes shields and removal a snap. Not hard or expensive to do. And when it's done no one will be able to tell anyway.
Doug

Not designed as a case saver. The rollers, cam and race have to stay perpendicular to the axis to work.
Most people don’t understand that.

I thought there were two types of bolt in sprags- one is the oem style and is just a stock replacement, except being bolt in. The Coan and A&A ultimate bolt in ones have the larger C6 rollers.

I don't remember any 727 explosion before trans brake were invented and used in drag racing: work: : confused: Maybe my memory is wrong

The last one I remember seeing was a 13:70 340 Barracuda. NLBA Cheetah valve body, no brake, no drum, no blanket. His trans guy warned him he had a bomb and at least needed a blanket. Guy said he couldn't afford it. When it let go it broke his foot and he was off work for a month.

Then there's the famous picture of the 64 Hemi car that pooped on the line....

Lots of explosions long before the brake. Witnessed a couple myself in the late sixties before LBA VB's including the one mentioned above. (Pisani & Waite)

As old as you are I would have thought you would have seen a few from back in the 60’s.

I'm thinking the No Neutral Drop Rule was probably triggered by a few drum explosions in the Pushbutton days.

Push 1 for go...

Kevin

When were 727 trans brakes invented and first used?

I use a Super Sprag, billet steel front drum, and a Blanket. Haven't been to the track in a while but I was always careful how I launched the truck. Years ago before I used all the 'Good Stuff' I broke a U-Joint coming off the line. I pulled the tranny when I got home and it had rolled over the overrunning clutch. After that it got a blanket and when I built the Hemi the tranny got all the 'Good stuff too

Cab ....A lot of people claimed being the first, a lot of early different methods were employed, BUT


First INTERNAL transbrake was Steve Griner, he mentioned to me first time he used it at Gatornationals, everyone near the starting line backed up knowing it was an automatic car, and was wide open and matted to the floor

Rest in Peace Steve, and thanks for all you did for automatics

https://www.legacy.com/us/obituaries/jconline/name/stephen-griner-obituary?id=11179613

The Clutchflite is the same as a Neutral Drop, that's why the LBA VB was introduced to protect the sprag. IIRC, B&M was the first to offer it.