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Old 12-11-2005, 08:09 PM
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700R4 help/advice

Ok I Need Some Advice From You Transmission / Rear End Specialists. or from some that have been there,

I Need To Know How a 700R4 will Hold up to 14.5w Rear Tires with a Ladder Bar rear Frame Setup and a Detroit Locker in a Ford 9". I'm Guessing in the end, I will be around 400HP to 450HP. what kinda 700R4 setup am I looking at performance wise ? and what size torq converter, and what kind of money ? this is a pro street look/build.

That is a lot of tire to turn, especially if it hooks up at all.

I was Going to go with a th350 with a 2800 to 3000 stall. but when planing my project and project costs, i'm thinking of running a 117,000mi Vortec the 1st yr or maybe two, to re-corporate from the build costs, b4 I build my planed 383 motor. I can buy a 5.7 vortec for $450 to $500. and put a LT4 cam in it and go, well plus a electric fuel pump, carb, intake, and HEI. and in the end have a set of vortec heads fo something else.

in the last yr or so b4 the 383 goes in, I might add a small shot of nitrous to the vortec 50 or 75 shot for fun

this is Not going to be a Daily Driver, but I might cruse to some local towns 20 or 30mi from here, maybe even a 50mi trip, a couple Xs a yr, so the 4th gear might be nice. is this 700R4 something I can build my self ? I've never built a auto tranny my self b4. helped build a 400th once, but was a helper and watcher more than a builder.

butt to turn those big tires with the 300 or so HP Vortec, I'm prob looking at a lower rear gear like 411 or 430 correct ? and the correct size torq converter. so I was thinking a OD tranny like the 700R4. I did some searching but would like to hear form You Transmission / Rear End Specialists on this project.



this is my plan
My Complete Plan
I'm Starting to Build a pro street 63 Nova 2Dr HT. plan is to be a 5yr project (Ladder Bar Rear frame and a narrowed ford 9", Big Tubs, Roll Cage, 14.5"W or wider Rubber on the Rear, 3 1/2" front Wheels, 4 wheel disc ect. ) I will be running a stock 65 front clip (No Money in my budget for a MII Front End, I can Not see a MII in my future) (including stock front frame, 65 radiator support and 65 fenders, and prob a stock hood at 1st) this is a father son project, that is Not going to be a Daily Driver. prob some warm summer nite cruising and some 1/4mi Drag Strip time, like 6 + Xs a yr at the strip. I have A nice 72 stock 4 bolt main SBC std. bore 350 & a built 350Th tranny, the motor I want to build outa the 1972 350cid 4 bolt main is a 383 stroker somewhere in the 425HP 450HP Range. but with this size project (plan is 5yrs to Finnish) I need time to build it and time to save the funds.



Thanks

Mustangsaly

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Old 12-11-2005, 08:21 PM
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Quote:
Originally Posted by Mustangsaly
I Need To Know How a 700R4 will Hold up to 14.5w Rear Tires with a Ladder Bar rear Frame Setup and a Detroit Locker in a Ford 9". I'm Guessing in the end, I will be around 400HP to 450HP. what kinda 700R4 setup am I looking at performance wise ? and what size torq converter, and what kind of money ? this is a pro street look/build.


Mustangsaly
thats alot of HP for a 700r4....have you considered the 2004r? i'm running a 700r4 with 350 HP but stepping up to 450HP is a big leap.
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Old 12-11-2005, 08:35 PM
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is the 2004R a better choice ? I won't start at the 400 450hp range, but will end up there, at least 400HP. and would like to do it right the 1st time.


thanks

Mustangsaly
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Old 12-12-2005, 08:42 AM
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I think that the 700 will work ok, just do not expect it to live up to any big HP numbers with the new engine and you may have to scrap the nitrous idea. Either way, the 700 or the 200 are not beginner transmissions. Converter wise, since this is a street car, go with whatever you are comfortable with. I would suggest something in the 2500-2800 range for street driving.
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Old 12-12-2005, 09:30 AM
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will the 700R4 hold up to hooking the big tires up and running the low gears ? like at the track ect. I'm guessing from what i've read, it will handle the vortec and hooking the big tires up with the low gears correct ? with the vortec and a LT1 cam, you think the car will turn the 14"w tires to smoke ? will it hold up to the 400HP 383 and the abuse ?





Mustangsaly
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Old 12-12-2005, 11:23 AM
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As I mentioned in another post, we have a 700r4 holding up to a 360+- hp vette with a 100shot on top of that.

If bowtieoverdrives can build and warranty 700's past 650hp and torque, there must be a way of making them withstand some serious horsepower.

I sometimes get the feeling that the 700's have gotten a bad rep in the past, and that it has carried forward into current conversation. But thats just me.
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Old 12-12-2005, 11:31 AM
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I have seen some 700s go well into the 650 700 hp range, however this is definately not the norm. I see more 500 hp cars with major problems than I see 700 hp cars with success.

The issue of handling the big tire is not really too much of an issue. Tire diamter can cause problems, but width does not seem to hurt transmissions very much. I see more problems with prople that have an under-tired car that shakes the tires- like a wheelhop situation. The action of free spinning and then hooking really hard is what usually breaks input shafts, planetaries, and output shafts.
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Old 12-12-2005, 04:54 PM
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The 700 will work fine up to 500 hp which is limited by the converter design! you will need to custom build the tranny with all the upgrades and will cost anywhere from 1500-2500 depending on ho does the work! do not take it to Amoco/cottman or a discount builder" bring it to someone that does specialize in the performance overdrives" You will need the converter custom built also and same applies here! I don`t care what anyone else say`s about how good a 2004r is? I`am doing one right now for a friend and cannot get the parts i need to upgrade this tranny such as thin kolene steels to expand clutch stack/new direct clutch drum etc; No problem with the 700`s
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