Transmission Adapters

Mark Yacavone · 06-29-2025, 09:51 PM

Quote:

Originally Posted by GTX JOHN

I wish there was an accepted adapter to use a
904 behind a Big Block Mopar.

There are adapters that we use in our bracket cars
but not NHRA approved (I do not think any are for Mopars).

Boy would that save us some money.

John, I think you'd have a good case for this, after seeing what's already out there.
You'd have to use a flex plate spacer, along with one that would bolt up on both ends.
You'll need a pilot adapter for the added length and the small to large pilot difference.

Maybe there's a few guys here who could tell you how to get this one added to the seemingly nonexistent approved adapter list. ;-)

MR DERBY CITY · 06-29-2025, 10:08 PM

Hey YAC, open can, turn upside down?. Observe worms

GTX JOHN · 06-30-2025, 10:02 PM

We already run a 904 with adapter and a custom
convertor on our bracket cars.

06-29-2025, 10:08 PM	#2
MR DERBY CITY VIP Member Join Date: Feb 2014 Location: Derby City, USA Posts: 3,637 Likes: 1,083 Liked 7,937 Times in 1,518 Posts	Re: Transmission Adapters Hey YAC, open can, turn upside down?. Observe worms

06-30-2025, 10:02 PM	#3
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,733 Likes: 2,799 Liked 2,484 Times in 697 Posts	Re: Transmission Adapters We already run a 904 with adapter and a custom convertor on our bracket cars. __________________ John Irving 741 Stock 741 Super Stock