700r4 power

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mdabbott2009
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700r4 power

Post by mdabbott2009 » Mon Aug 10, 2015 7:18 pm

Will a proper built 700r4 handle 550hp 496 that I'm thinking of building in the furture.

What about converter freakshow build a good lock up?

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Alan Roehrich
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Re: 700r4 power

Post by Alan Roehrich » Mon Aug 10, 2015 8:10 pm

Look to spend $3K on the transmission, minimum.

I honestly do not like the 700 R4 or 200 4R for big torque applications, especially with traction and in heavier vehicles. The bigger the engine, the worse it is.

I use ATI or ACI converters.

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Re: 700r4 power

Post by mdabbott2009 » Tue Aug 11, 2015 8:38 am

Thanks alan
My trany guy said I'd be better with a 700 over a 350 whoch I can kinda see

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Re: 700r4 power

Post by Alan Roehrich » Tue Aug 11, 2015 7:05 pm

Actually, the forward input drum, the output shaft, and the planetaries are stronger in the TH350 (except for the late 4L60E and 4L65E upgraded planetaries) than in the 700 R4.

The TH350 is often used in 600-800HP race cars (with a few upgrades).

If you want an overdrive, you can always consider a 4L80E.

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Re: 700r4 power

Post by pdq67 » Tue Aug 11, 2015 11:31 pm

The real Art Carr said the 2004r can be built to take BIG power, (if I recall like 700hp?), if you want to spend the money. And back when I asked several years ago, the 200 was a better tranny than the 700 to hop up. But I think times have changed tilting towards the 700 nowadays..

Fwiw, years ago, I also asked Jakeshoe about a full manual 4L80 and he said one could be done. Tranny wouldn't need a "brain" is why I asked is all. I think it would even have a hand switch controlled lockup converter??

Contemplated one for my 550hp, 580t/496 is why I asked.

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Re: 700r4 power

Post by mdabbott2009 » Wed Aug 12, 2015 6:12 am

We actually talked about doing 4l80e since it will be in a 4wd this probably won't really happen for a year or so but I want to fi d everything.
Does anyone know of a 4l80e 205 adapter advance adapter makes a kit but its about 650 bucks and really blows the budget out the door

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Re: 700r4 power

Post by Alan Roehrich » Wed Aug 12, 2015 9:44 pm

It should not be that difficult to mate an NP205 to a 4L80E, given that the 4L80E is a derivative of the TH400, and the NP205 was installed behind the TH400 after around 1978.

The 700 R4 can be upgraded by using 5 pinion planetaries from the 4L60E or 4L65E, "The Beast" sun gear shell, the new Sonnax severe duty forward input drum and shaft, and the new Sonnax low gear set, which reduces the excessive 3.06:1 low gear to something more usable, around 2.75:1, which also reduces the excessive drop between 1st and 2nd. Again, though, you're going to easily top $3,000 for a 700 R4 built that way. I've made them live behind 550HP small blocks in street cars that weigh 3500#, without the forward input drum, and had them run low 10's for 4-5 years or more. I don't think they'll do as well behind a big block with a lot of torque, especially not in a heavy 4x4 truck.


The 200 4R would not work in a 4x4, and it requires a sung gear shell, a forward input drum with a billet shaft, and a stator shaft, among other things.

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Re: 700r4 power

Post by pdq67 » Thu Aug 13, 2015 4:13 pm

Alan,

What are your thoughts on a full manual 4L80 with no "brain"?

As I mentioned earlier, I talked to Jakeshoe about this but it's been so darn long that I have really forgotten what he said?

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Re: 700r4 power

Post by F-BIRD'88 » Fri Aug 14, 2015 11:18 am

Why would you want to use a / any overdrive transmission in this application?

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Re: 700r4 power

Post by mdabbott2009 » Sat Aug 15, 2015 8:55 am

Started out me asking what a 350 would cost to hold up and he said you would probably be better with 700r4 simce I already have transgercase and everything else but after little more talking for long time use and this is going in to what will be a damn near show truck that I'm going to daily drive I'd probably be better off with a 80 ove a 400 so now probably will keep looking for 80 stuff

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Re: 700r4 power

Post by woody b » Sat Aug 15, 2015 2:22 pm

What's the intended usage of the truck? Like F-bird said, do you need an overdrive? Regardless, with a big block and 4wd I'd be looking at a TH400 or a 4L80E. Forget the 700 or 200 unless you just want to spend a bunch of money. IME a 400 is a better choice than a 350. I put a 4L80E in my 1982 motorhome. It had a TH400, and a 4.56 gear. I changed the gear to a 4.10 and it struggled to get going with my trailer. I put the 4.56 back and done the 4L80E. It's been a could decades but it was pretty simple. I used a PCM from a 6.5 diesel application that had a mechanical pump. Basically all the engine inputs were throttle position and rpm. A friend of a friend programmed me a PROM that had the correct shift points and it worked great. If you don't need overdrive and lockup for lots of highway miles I'd stick with the Th400 though.
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Re: 700r4 power

Post by Speedbump » Sat Aug 15, 2015 4:32 pm

I'm using an 80 behind my 55 pick up with a 505CID big block. TCI makes a controller that is killer for this unit. Has paddle capability, normal and sport mode and converter lockup in any gear except first I think. Costs a little but you can program and reprogram stuff at your leisure with the hand held. I switched from a 400 with a DNE mechanical OD to this. Using a 4.11 gear but may switch to a 3.89 after I have the new combination up and running again in a couple of weeks and do some cruise and acceleration testing.
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Re: 700r4 power

Post by dfarr67 » Thu Jan 14, 2016 10:29 am

Hard parts aside, I have a high torque 383 chev 4x4 and a fellow I trust strongly suggested I move away from Dexron VI into Amsoil Torque Drive.

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