20+ years of "Building 904/727 for drag racing use"

Duane said
I saw a post on this site a while back where you said that the new 30 element sprag for the 904 does not work because you saw or had a failure. Can you elaborate on what you meant by doesn’t work.

Sure. If the assumption is that the 30-element dog bone style sprag is going to handle a lot more power, say in a big tire, tube chassis car, it's not. So, to say it doesn't work, may have been a slight error on my part. It may work in your (just an example) 600hp, small tire drag car--just the same as the 10 element OEM 904 sprag. I know who developed and co-developed that sprag, and it is not my intention to mud-drag or smear those folks. It is my intention to advise people of the possibility of failure if purchasing that sprag for a certain application.

The factory pin is just pressed into the output shaft.

I am aware of this.

One of the major manufacturers of 300m shafts will not sell a 300m input without the 300m output for a 904 or 727, FYI.