904 transmission
 

Looking for opinions on who builds the best 904 transmission for a 340. And what gear ratios work best. Thank you.

Re: 904 transmission
 

ProTrans, A-1 and Joel's On Joy are the best.
Gear ratios depend on which year of 340 you will be running and the car weight.

Re: 904 transmission
 

I’m running a 70 duster D/SA at 3,030 pounds

Re: 904 transmission
 

Joel's on Joy. They dyno the trans and advise care of the trans

Re: 904 transmission
 

Can anyone provide the contact info for Joy (Joel) Thank You

Re: 904 transmission
 

He’s outside Detroit in South Lyon. (248) 446-6024

Re: 904 transmission
 

Rick Allison
A&A transmission 317-831-3066
There is no better. he just built one for my Drag Pak.

Re: 904 transmission
 

Pro Trans builds ALL ours!

Ratio depends on weight and altitude you run at and a
couple other things....Not set in Stone!

Re: 904 transmission
 

I spoke to Joel yesterday- a real nice down to earth guy whom is extremely busy (68 Factory Stocker Trans to do) we will talk again at his convenience about a 904 but a nice guy without a doubt - must be a well kept secret or I have been an ostrich but thanks for the referral

Re: 904 transmission
 

I’ve heard many good things about pro trans. Planning on giving them a call soon! Thanks for the helpful info!

Re: 904 transmission
 

Yes pro trans is building me one now for a 340 combo

Re: 904 transmission
 

Does anybody have a Pro Trans list of letter codes and available gear ratios?


Edit: I found the link in the fine print on their website.

Re: 904 transmission
 

Just FYI that on insidecompracing.com you can go to the classified section and generally find some 904 gear sets and trans for sale. Many of the comp folks run Pro Trans.

Re: 904 transmission
 

We use Pro Trans. We like the 727 SB more than the 904. Has a few different parts and deeper pan doesn't hit the rotating assembly. You probably need a 2.65 to 275 first.

Re: 904 transmission
 

I’m thinking 2.75 I want to get off the line much quicker than I am now.

Re: 904 transmission
 

You can try 2.75 inexpensively......They came factory in many late model
904s. They are not straight cut BUT a Huge improvement over 2.45 in a small block.

Re: 904 transmission
 

Pro Trans just did a 904 for my Aspen with a 360. He decided on a 2.61 first and 1.61 for second gear.

Raul