what can a 700R4 take with out exploding? i plan on droping a 450hp motor in my camaro and i don't think the 700R4 will take it now what should i do rebuild or new transmission? and if new transmission what to go with? thanks

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- - 1984 Camaro z28 305ci H.O. - -
http://www.geocities.com/nuclearz28/

It depends on if it is stock or built. My friend has a 55 Chevy with a blown 462 big block, and the transmission shop that built the tranny for it, said they put all the right internals in it to hold up, but he didn't guarantee it would. I would think behind a small block, if the guy doing the tranny knew what internals to put in, it would hold up very nicely, and go down the road at a lower rpm, resulting in better highway driving and fuel mileage. http://www.camaros.net/forum/cool.gif

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Jeremy Mc.
69 Camaro
Roller 396, TH400, 3500 stall, 3.90 12 bolt posi

The 700 will easily handle that level of power with a few key things done during a rebuild. There are a few problem areas in the stock trans that have to be changed to hold up for any ammount of time. Any good trans shop will be able to set you up, no problem.

Dan

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67 Pro-touring Camaro-327, 9:1, Comp XE268 Cam, Perf. RPM Intake. 750 Holley, Sportsman II Heads, Ceramic coated headers, 700R4 trans, 17" Amer. Racing TT2's, 12" disc brakes, custom stereo, black with white stripes, cowl ind. hood.

www.lnjstreetrods.com (http://www.lnjstreetrods.com)

Larry

I am currently getting 700r4 built for my mild 454 in my 69', in which I plan to build it up to 500HP on straight motor in the near future.

Here are some of the things that is being done with mine...I'm sure I will miss some stuff.

- Truck tranni core.
- Corvette #093 2-4 Servo Assembly
- High-torque 2-4 Kevlar band
- 9 Hi perf Reybestos Blue 3-4 clutch packs
- high capacity pump assembly and moly rings
- Hardened sun shell
- High capacity forward sprauge
- Reybestos Blue hi perf. friction plates
- All Torrington bearings
- Spot Welding in all the right spots for strength, and a slew of other goodies.
- Transgo Stage 2 shift kit.
- B&M deeep pan.
- 9" 3500 stall.

This is a Street/Strip build I'm getting done from local performance tranni/engine place I always go to. This should be able to handle 500HP, easily.

Oh did I mention 2000rpm on the highway...Yahooooo!!


[This message has been edited by mikestr (edited 07-24-2002).]

opps duplicate. Please delete me.

[This message has been edited by mikestr (edited 07-24-2002).]

Buy a new 700R4 tranny. I was on a site a while ago and I think I remember reading that if built right one can handle 750 horses. I will try to find the site and get back to you if I do.

~CHR~

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The race...The smoke...The rush!
The man...The machine...The engine!
Future Camaro Owner

http://www.700r4.com/trans/difflevels.htm

check that out. the lvl 3 tranny can support up to 600 horses and it doesn't say what the lvl 4 can handle.

~CHR~

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The race...The smoke...The rush!
The man...The machine...The engine!
Future Camaro Owner

I have a 430 HP,383 in my s-10 with a 700r4 and 2400 stall.I run 3.73 gears and have ran 13s at 106 as well as pushing 150 mph on the autobahn on a regular basis,The trans is a racing unit but was well worth the money.I have over 30,000 hard miles on it and it still works like a champ.I cruise at 80 mph with 2600 rpms .If you go to a good shop it should hold up to the 450 with no problem.Be sure to use a pressure guage to set your TV cable,its the life of your trans

I had one built that is very similar to mikestr and it has held up behind a 550 HP 400 smallblock for over three years. I think you can spend 1000 to 1200 and get a pretty good 700r4 built if you provide the core.

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SCOTT
69 RS-SS 396 4-SPEED

I have a 700R4 built by Level-10 (http://www.levelten.com) that was built and guaranteed to handle 800HP ... if you want more it just costs more. They also built me a lock-up TCC to handle the same HP.

<BLOCKQUOTE>quote:</font><HR>Originally posted by richard scott:
Be sure to use a pressure guage to set your TV cable,its the life of your trans<HR></BLOCKQUOTE>

Richard, I was curious to know more details about this procedure.

Thanks.

The practical limit has been about 550 hp and 500-550 ft. lbs. for these trannies. Now I know of guys that run low 10's with these and they work well, but are freshened constantly. I also know of people with more power than this that have made them live, but they never run slicks. They'll live behind a LOT of power if they never hook up, and just spin the tires.

Now I'm hearing they can handle 800 hp+ and I'd like to know how. They simply don't have the billet parts developed for these trannies to handle that punishment, or do they? High gear is a big problem as there's a timing problem to engage the clutches that burns them up no matter how good the parts are that you use; it's built into the trans and can't be changed (or so I've been told).

Bottom line, if the guy will warranty the trans at those levels, and you don't mind swapping it out, then at least you're covered. Does he give a torque rating for these trannies as that's what will kill them.

Jody

<BLOCKQUOTE>quote:</font><HR>Originally posted by Camcojb:
The practical limit has been about 550 hp and 500-550 ft. lbs. for these trannies. Now I know of guys that run low 10's with these and they work well, but are freshened constantly. I also know of people with more power than this that have made them live, but they never run slicks. They'll live behind a LOT of power if they never hook up, and just spin the tires.

Now I'm hearing they can handle 800 hp+ and I'd like to know how. They simply don't have the billet parts developed for these trannies to handle that punishment, or do they? High gear is a big problem as there's a timing problem to engage the clutches that burns them up no matter how good the parts are that you use; it's built into the trans and can't be changed (or so I've been told).

Bottom line, if the guy will warranty the trans at those levels, and you don't mind swapping it out, then at least you're covered. Does he give a torque rating for these trannies as that's what will kill them.

Jody<HR></BLOCKQUOTE>

Camcojb, I certainly agree with the fact the tranni by nature is nowhere near the strength of say, a TH400.

You can certainly build a 700 that can last for a long time behind a 500HP/500lbs + monster motor. But really comes down to how much punishment you give it. I don't think that a 700r4 will last too long with repeated 5000 RPM trans. brake launches on a huge slick. But for the street and occasional strip car with a sticky tire and possibly a slick can last as long as it is not abused day after day after day.

On another note, it matters on the way it is built and who builds it. There are a lot of sloppy guys out there that claim they know what they are doing and really don't.

I think in the end it is a matter of preference, the overdrive alone, to me, outweighs the negatives.

But then again, what do I know. http://www.camaros.net/forum/rolleyes.gif

Mike,

I think you're right. I know of a builder who does very well making these things last at about the 500/550 hp range. I was questioning the 800 hp claim as that's way beyond what I've ever seen one live at.

The reason I posted this is to find out if there's some new parts or developments that have got the 700's to hold 800 hp on a true street/strip car with slicks; something like what sr71bb has.

Jody