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Old 02-14-2013, 03:25 AM
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700r4 or 200-4R behind 454 bbc?

Hey guys so ive been doing so much research and trying to decide what tranny i want to use behind my 454..the engine is now rated at 400+ hp and i wanted to go with an overdrive as well as the 4 speed so i bagged the idea of the th400 and th350..the car is only for cruising (street) but will like to have some fun here and there. Will not be seeing the track at all. I already have a 700r4 core and would like to rebuild it if i decide to use it or buy the transmission from a shop like maddog..Now which tranny is less likely to fail? Again only street use. And what gears will be enough to get me off the line yet at the same time keep rpms low while cruising?? btw...car is a 1976 monte carlo thanks alot guys i appreciate your help

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Old 02-14-2013, 01:26 PM
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In my opinion you will be living on borrowed time running a 700R unless it is highly modified. A 3.73 or 3.42 gear is what I would recommend
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Old 02-14-2013, 01:56 PM
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it' not the hp. it's the ft lb's that hurt these..
the 2004r has more backing for high torque and can be built to 800ft lb
but plan on 2600.oo + converter
www.CKPerformance.com
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Old 02-14-2013, 02:44 PM
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Well I do have a budget and have a feeling these transmissions are going to be well over $1500..what is the biggest difference in th400 and 700r4 besides the 700 being an overdrive and far weaker?
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Old 02-14-2013, 02:59 PM
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Quote:
Originally Posted by angelf0926 View Post
Well I do have a budget and have a feeling these transmissions are going to be well over $1500..what is the biggest difference in th400 and 700r4 besides the 700 being an overdrive and far weaker?
originally designed when a 454 had 300 ft lb tops and small blocks where 165-180hp wonders..
the th400 was designed when cars where huge and heavy and big engine torque
if you read the list of hard parts put in a 2004r to live behind 800 ft lb..
it's almost everything..
only reason the 7004r and l60e lasted behind 325hp trucks is the ecu torque management system.. granny control..
bullet proof is a th400 and a gearvenders o/d but the o/d is 2400 alone
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Old 02-14-2013, 03:12 PM
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Yea, I have to agree, it's the TQ that realy puts the hurt on trannys. And since you are going with a big block, tq is what those motors give you alot of. I like the 200 4r but that was my thing. I didn't want to shorten the drive shaft incase my kids years later want to put it back to original. You'll have to shorten the drive shaft for the 700 but not the 200. Just put my 200 in last year and it worked great. I rebuilt mine myself an added alot of extra clutches, ten vain pump , ect. I learned alot from doing it myself. I already have 3.42 rear gear and going to change to 3.73 in a couple of month. So that maybe something else you'll have to think about. You can do that later after the tranny change. Double check what year of 700 you have if you don't know. The earlier ones are not that good. lThe 200 4r have alittle of the same problem. I like the 200 made after the 250 day of 86 from v-8 cars with kc valve bodies. Study the net and you will be a little bit knowledgeable about what you want to do.
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Old 02-14-2013, 05:00 PM
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Check out PATC's Raptor 700. I have heard of them from a few guys on Thirdgen.org. I have a third gen Camaro (83), that I may consider this.
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Old 04-02-2013, 07:29 PM
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i don't think the 700r4 is a good choice for a big block.. solely because that deep first gear in a 700r4 would just be a waste with a big torquey big block...
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Old 04-03-2013, 10:27 AM
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Those big blocks are just hard on tranny if you don't have a 400. The 400's are just built for alot more power to be put threw them. If you hammer that big block alot, your going to have to upgrade the 200 or 700 alot to handle it. You can add more clutches and larger preasure valves, but the other hard parts start to fail. If you keep street tires on it, and don't drag race it, you may never have a problem with a good rebuild. If its stock, be prepared to carry extra money for the tow truck driver.
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Old 04-03-2013, 10:55 AM
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4l80e would work well if you need the OD.

th700 has larger internals than the th200r4, but the th200r4 have the better gearing.

peace
Hog
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Old 04-03-2013, 11:05 AM
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can't argue about the gearing. Like I said, there was alot of reasons i chose the 200 4r. I noticed that when i first took mine out for it first real drive, that it drove easier, then I realized that what i felt was that it took less power. My 350 turbo never drove that easily. I should mention that when you do those swaps, and old trick i learned years ago, was to use small pieces of old intertube folded over a couple of times between the tranny mounts and cross member mounts. It also helps with vibration issues.
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