How about a good Drag race 904 build discussion

Are you saying that after your rear gear breakage that you should have checked the roller clutch?
I do not drive my car on the street.
I run external filters in my cooler lines to minimize the aluminum debris. But yes you need to change the fluid once in a while.
I never said the new roller clutch would make my car faster. But I am hoping it will be more reliable and durable.
I do not believe everything I read in a catalog. I believe my Et slip.
As I said in a previous post my car dropped its et over half a second in performance with no change to the motor. Ymmv as they say.
I have already agreed with you that I have not seen a 904 explode a front drum.
But there seems to be confusion as to the root cause of a 727 only drum explosion.
As I understand it the drum in a 727 over speeds only if the roller clutch does not lock like it is supposed to. It is a by product of the failed roller clutch. Now how is that clutch installed in a stock 727. It is splined into the aluminum case.
As I understand it, sometimes those splines strip right out of the case. If it does that the clutch cam will spin right in the bore. The fix is a bolt in cam. If the splines do hold the other type of failure is for the inner race to over power the roller and break. The fix for this is to add more rollers and reduce the amount of load on each one. Or the other fix is low band apply so the clutch sees none of the load at all.
The stock 904 cannot spin in its bore because it is riveted to the case. This is equal to a bolt in clutch cam. So it cannot fail that way. But even the 904 can still over power the rollers..
The difference is the 904 just loses first gear.
Do you disagree with this explanation.? If you do not can you explain to me in technical terms why you disagree.
You acknowledge that the 904 only uses 25 horsepower. Can you give an explanation why it uses less horsepower.

Thanks

Duane