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904 Tranny Question
#248626
03/09/09 04:45 PM
03/09/09 04:45 PM
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Joined: Jan 2003
Posts: 3,625 Millinocket, Maine
JonC
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,625
Millinocket, Maine
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I just got done pulling the 904 out of my 72 Cuda and putting it back in after a torque converter change. Then I fall upon a 904 with the low gear set. Would it be easier take the gearset out and intall it in the tranny in the car now or just replace the tansmission. I can pull it without removing the headers, but still have to do everything else, headers back etc. EDIT: The tranny in the car now was completly gone trough last summer and the new one has to be gone trough before installation.
Last edited by JonC; 03/09/09 04:47 PM.
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Re: 904 Tranny Question
[Re: JonC]
#248628
03/09/09 05:31 PM
03/09/09 05:31 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I had a low gear set in an '83 cordoba 318/904. It was just a daily driver but I did not notice any great advantage with the 2.74 vs the std 2.45:1 ratio 1st gear in how it took off.
live every 24 hour block of time like it's your last day on earth
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Re: 904 Tranny Question
[Re: MoparforLife]
#248630
03/09/09 07:26 PM
03/09/09 07:26 PM
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Joined: Jan 2003
Posts: 3,625 Millinocket, Maine
JonC
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,625
Millinocket, Maine
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I have 3:23's in now and want a little more umph in the low end. I have a set of 3:55's and like the low end umph with them. But I would like the 3:55's with the mileage I get with the 3:23's. Would I be close with the 3:23's and low gearset?? I'm in northern Maine and still have at least a month to go before hitting the road so I have time to do the work.
Last edited by JonC; 03/09/09 07:27 PM.
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Re: 904 Tranny Question
[Re: JonC]
#248631
03/09/09 07:52 PM
03/09/09 07:52 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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3.23 X 2.45 = 7.9135. 3.23 X 2.74= 8.8502. 3.55 X 2.45= 8.6975. 3.55 X 2.74 = 9.727. You could pull your trans & R&R the front pump & a bit more & add the low gear set & you're all set.
live every 24 hour block of time like it's your last day on earth
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Re: 904 Tranny Question
[Re: RapidRobert]
#248633
03/09/09 08:06 PM
03/09/09 08:06 PM
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Joined: Sep 2004
Posts: 2,094 oberlin, Ohio
Rapid340
top fuel
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top fuel
Joined: Sep 2004
Posts: 2,094
oberlin, Ohio
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I Think the low gearset is a BIG plus in a car with 3:23 or 3:55 gears. It will give you the equivalent of a 3.61 or 3.97 gear on launch. For optimal 1/4 mile times you will shift 1-2 a bit higher than 2-3.
You could think of it as a half step to an OD trans with a .80 OD ratio (and the same overall launch ratio).
Last edited by Rapid340; 03/10/09 08:49 AM.
1971 Factory Appearing Duster 340 11.000 @ 122 mph
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Re: 904 Tranny Question
[Re: RapidRobert]
#248635
03/10/09 08:27 AM
03/10/09 08:27 AM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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make sure you know if one is lock up or not tc will not interchage with them I allways get a stock high stall lock up tc for mine with the low gear sets I would rather have non lock up for hot rodding them but the lock up will deff help MPGS with the 3.55s run it till she then slam the other one in and save the time and $ for now...
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