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Old 12-12-2018, 06:44 PM   #11
cummins
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Thumbs up Re: 904 transmission

Quote:
Originally Posted by Mopar 340 View Post
I’ve heard many good things about pro trans. Planning on giving them a call soon! Thanks for the helpful info!
Yes pro trans is building me one now for a 340 combo
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Old 12-12-2018, 09:40 PM   #12
S/ST 3040
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Default 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.

Last edited by S/ST 3040; 12-12-2018 at 09:47 PM. Reason: Correction
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Old 12-13-2018, 08:15 AM   #13
jmcarter
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Default 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.
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Old 12-13-2018, 12:14 PM   #14
Jeff Teuton
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Default 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.
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Old 12-13-2018, 06:21 PM   #15
Mopar 340
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Default Re: 904 transmission

I’m thinking 2.75 I want to get off the line much quicker than I am now.
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Old 12-14-2018, 12:00 AM   #16
GTX JOHN
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Default 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.
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Old 12-14-2018, 05:15 PM   #17
Duster 7695
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Default 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
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