How to Launch with a 727

[tactransman]

 HOT! HOT!

[wiging19]

Incredible.  I've never seen a transmission that totaled before.  That was beyond my wildest dreams.  Thanks for sharing the picture. 

[oldkimmer]

The sprag always takes a lickin in first when u do not have the low band applied. On stock type trans 1st is applied as soon as the trans selector is in 1. In drive all that is holding is the sprag. Some shift kits do not allow 1st band on in manual low, these should be avoided like the plague. Any trans with manual low working does not usually have  A SPRAG MALFUNCTION unless it is overstressed from many years of abuse.When doing a burnout shifting up is fine, the problem begins as soon as the wheels stop spinning as they grab traction and the trans downshifts back to 1st.. and the only thing holding is the sprag, cause your shifter is in 2nd, BANG.....trans failure There are far more chevy+ford failures than dodge.

[ntstlgl1970]

Launching will just depend on your car and the track conditions. I have a 2800 stall speed converter, launching the car at or near that RPM results in a terrible 60 foot time, but 1900 or so works well. The track where I live (Sacramento Raceway) doesn't do much in the way of track prep for test and tune so adjusting tire pressure and launch RPM trial and error is the only way to figure it out.

[wart1de]

Do the scattershields actually do anything? I've heard they are a waste of time and that if the box lets go parts go straight throw it ?? I'm a paranoid type of guy so I was considering installing a shield when I get around to putting the driveline back in the 'Cuda.

[tactransman]

Yes ,they help.

[Carlwalski]

If you're paranoid then grab yourself a Drive-shaft loop as well.
US Car Tool sell them - http://uscartool.com/body.html

My 'Cuda will have that and their subframe connectors. 

[Tubbed440]

I've heard several diffenrent opinions on the subject of low band apply.  Some say you need it, some say you dont.  I for one like to have the billet steel front drum, bolt in sprag and low band apply.   

Here's a discussion on the topic if you want to read up some more....

http://www.moparstyle.net/forums/showthread.php?t=70657&highlight=low+band+apply

[tactransman]

Low band apply is BETTER! Hands down, if you know how a Torqueflite works, it is obvious that low band apply is safer and stronger and gives your transmission a longer life. If you roll the sprag , it is a good chance that your case is junk!

It is harder to get a low band apply transmission to work nice and crisp with clean shifts  but in the transmission industry that separates the men from the boys!!!!!

[moper]

Those in the know will replace the forward clutch retainer first. Then, the sprag, the valve body type, the way you do burnouts, etc, cannot result in an explosion like in the pictures. You can still hurt the trans, but the drum is what actually exploeds. And it can go with enough energy that even the steel sheilds may not contain it. I know blankets and carbon fiber cant stop the shcrapnel. Neither can floors, doors,driver's body, or roof panels. It's ugly.

[Tubbed440]

Those in the know will replace the forward clutch retainer first. Then, the sprag, the valve body type, the way you do burnouts, etc, cannot result in an explosion like in the pictures. You can still hurt the trans, but the drum is what actually exploeds. And it can go with enough energy that even the steel sheilds may not contain it. I know blankets and carbon fiber cant stop the shcrapnel. Neither can floors, doors,driver's body, or roof panels. It's ugly.

   Yea, what he said.

[tactransman]

The number one reason for a drum failure like in the picture is a drive line failure under full throttle. The transmission gets driven by the inertia of the output shaft (instead of the input shaft) and the gear ratio from that direction is an overdriven ratio , so the direct drum can be driven 20,000 plus RPM.
Centrifugal force basically "slings" it to pieces.
With a low band apply valve body it does engine braking in low gear to limit that "overdriven" RPM that can occur in low gear under full throttle. Second and third have "engine braking" no matter what type of valve body you have.

The blankets and shields don't stop it always , but you have to do all that you can do for safety.