turbo action valvebody install

It's more of a safety thing,
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Quote: by leaving the low/reverse band off, the sprag has to do all the holding of the low/reverse drum. This now makes the sprage a weak point in the 727 trans because the low/reverse band is not applied along with the sprag.
What happens to a 727 when the sprag fails? The transmission will free-wheel at 2x the eng. RPM. When this happens, and the stock steel front drum is in the transmission, the front drum will explode.

(There's a pic of the exploded tranny on that link, wonder where all those pieces went? Hopefully the guy had a tranny shield.)

Now that you know what can happen when having the low/reverse band off/unapplied when running a stock steel front drum, it's like having a time bomb strapped to your car. Do you want a valve body with low band apply? I know I do.

How can the 727 sprag fail in a racing transmission ?

1. Any time the sprag is shocked, you brake a U-joint, axle, or ring&pinion, it can cause sprags to fail


2. Driver error. In the heat of competition/excitement a driver could accidentally nuetral-drop the transmission. I know what your thinking, I've never done that. But it could happen.


3. If the carb or ignition causes a back-fire and the car noses down and picks back up, or if you get in and out of the throttle while in first gear, you can damage the sprag.


4. If the car hooks, then the tires spin, then hooks again, the sprag can fail. And I know none of us have EVER had traction probs. (yeah, right)


5. Doing burn outs, starting in first gear is the biggest no-no of all. Burn outs should be done starting in 2nd gear and shifting into 3rd gear.
All 5 conditions are while in first gear.
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I know there's a few members that run the TA valve bodies that don't have low band apply and have never had any problems, but since your buying a new one anyway why risk it!