727 W/ 904 internals

[Myron Piatek]

Originally Posted by Phillip marvetz

Where do you get an adapter John?

If I may........J. W. Transmissions in Rockledge, FL makes the "Ultrabell" as one option. It's basically an SFI certified flywheel shield as well as an adapter available in quite a few configurations.
I couldn't help but wonder if NHRA could be petitioned for its acceptance in Stock and/or SS based on its safety qualities, as long as a corporate trans is used. (If it hasn't been tried already.) GM and Ford appear to have the luxury of interchangability of their big and small transmissions between big & small blocks. It would save some money over 727 cases with 904 internals.

[bdixon]

Been there done that!!!!!!!!!!! First asked div. passed me on to national both said not yet ...wanted to use 904 with ultra bell for stock in my big block combo,, I do think if more people would call and ask it would help,, it would be a safety issue also the ultra bell is sfi approved..bryan d stk5010

[Mark Maez]

The rules regarding the case being OEM would have to be changed I dont think that should happen in stock, maybe Superstock.

[GTX JOHN]

When we bought the White 73 Roadrunner 6 or 7 years ago it

had the 904 with adapter mating it to the 440. It had been raced

for several years in stock with it and apparently never had a problem.

I did not ask anyone or say anything about it ................ I just removed it!

Phillip: I will go over to shop tomorrow and let you know

who manufactured the unit. It has the trans bell housing machined

off and replaced with a bolt on bell housing with big bolt pattern

adapter and requires no spacers or special flexplate but uses

904 converter of course.

[Phillip marvetz]

Oh, I was thinking something more like a midplate adapter.
Why is that the fords and chevys get to use the small transmissions and we have to go thru so much hassle?

John, I need a converter for the 340. pm me if you have anything good for sale. My faithful old Dynamic came apart last weekend at Ashcroft.

[Bob Pagano]

Its a bolt pattern change thats not legal.

[Phillip marvetz]

Bob,
On another thread someone stated that the FE bellhousing's have to be cut and welded to make a c4 work, Is this true?

[Bob Pagano]

Havent got there yet, if so then a pro trans C6 - 904 is in order, Alex D could answer that for sure and I saw another c-4 post that I will have to go read but the chevys have it made.

[Bob Pagano]

Phillip, From what I just read you need an adapter for a c4 to FE, there is a sheild bolt on that works but than thats a gray area.

[Phillip marvetz]

Well I guess it's like the pontiac guy's running the chevy bolt pattern transmissions, A little gringing and drilling is o.k with nhra. I guess if I weld a 727 bellhousing to a 904 case all will be fine. Time to fire up the spool gun