904 vs. 727

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sublimeswinger

sublimeswinger

SUBLIME Senior Member
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hey ive got a question. Ive got a guy who will sell me a rebuilt (never re installed) 904 or 727 for $125.00.Same price for both.Im putting it a 72 dart with a soon to have slightly moded 318(carb,intake,maybe a cam),8 3/4 rear w/ 3:23 gears.
what is your suggestion?904 or 727? what i want is a muscle car.not a strip racer just one that can somke tires and race at a light.300-400hp maybe.
 
sublimeswinger said:
hey ive got a question. Ive got a guy who will sell me a rebuilt (never re installed) 904 or 727 for $125.00.Same price for both.Im putting it a 72 dart with a soon to have slightly moded 318(carb,intake,maybe a cam),8 3/4 rear w/ 3:23 gears.
what is your suggestion?904 or 727? what i want is a muscle car.not a strip racer just one that can somke tires and race at a light.300-400hp maybe.
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What did you have before in the dart? also, do not forget to look at torque converters, very vital to a good build/running car. A 904 will be fine up to the task, i run a 904. abodyjoe runs a 904 with a low 12second 360 dart. they also use different driveshafts, so keep that in consideration. hope it helps some. imo, 904 will be what i'd go with.
 
sublimeswinger said:
i have a 904 now for a slant 6.what is the reason to go with the 904?
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From what I have read and heard and seen, about 40 to 45 horsepower to the rear wheels, no need to change the drive shaft if going from a 904 to a 904 and you can continue to use the original stall converter if you want.
 
I use a 904 in my car and it runs 10.60's, maybe 50's in good air this year. I've cracked one converter snout and had the input shaft splines where it presses together with the rear clutch drum loosen up. I'm not sure if it was the input shaft or the drums fault but since I've replaced them both I haven't had another problem.

I have a couple friends that race big blocks in stock and super stock, they both use $5000 trannys that are 727 cases with 904 internals in them. Pro Trans I believe makes them. Those guys have to have the stock trans case but they can do anything to the inside they want. They are said to be worth about 2 tenths to them. The SS Hemi racers say the 904 guts are good to about 850 HP, after that they don't stay together.
 
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