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Old 09-18-2013, 12:26 AM   #1
gbody1

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Default 2004r or 700r4

which way to go. or even bother when you are going to run a 500hp 455. Is road trip mpg going to be enough to matter or just go on and put in a TH400?
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Old 09-18-2013, 08:34 AM   #2
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Default Re: 2004r or 700r4

I would say the 200r4 since it can be built stronger than the 700r4, what kind of driving are you planning, if you have a good th400, I would recommend a OD unit like gear venders
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Old 09-18-2013, 09:02 AM   #3
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Default Re: 2004r or 700r4

There is a very good and informative tech article on the GM transmissions on the Wild About Cars site. I think it will help you make some good decisions and also identify specific transmissions. Here's the link:

http://wildaboutcarsonline.com/cgi-b...aldisplayed=50
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Old 09-22-2013, 02:32 AM   #4
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Default Re: 2004r or 700r4

2004r is a bolt in, the 700 needs an adapter plate. Gear spread is better with the 2004r than the 700r4(less rpm drop on up shift), but either trans is going to need major upgrades in hard parts to hold up to your torque output. Unless you can build the trans yourself, you may find an overdrive unit and a T400 are a less expensive choice in the long run.
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Old 10-30-2013, 11:23 AM   #5
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Default Re: 2004r or 700r4

2004r for sure.. also has the universal bell housing!

Direct bolt in no adapter plate and good to go!
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Old 11-01-2013, 11:48 AM   #6
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Default Re: 2004r or 700r4

I would say the 200 4R. The problem will be finding a local shop that knows what their doing with it. Go with a known builder of the 200, not somebody that ses they can do it. I went that rout before and got burned.
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Old 11-01-2013, 05:55 PM   #7
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Default Re: 2004r or 700r4

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I would say the 200 4R. The problem will be finding a local shop that knows what their doing with it. Go with a known builder of the 200, not somebody that ses they can do it. I went that rout before and got burned.
Bingo! Most shops steer clear of these transmissions due to the fact they don't know how to make one work. I'm convinced thats why most shops suggest the 700. Easier for them to make a buck, even though the 2004R is a better trans.
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Old 11-02-2013, 06:22 AM   #8
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Default Re: 2004r or 700r4

I agree with what has been said above. I have ran both behind Olds 350's but different applications. I have gone through two in each, so stockish they aren't bullet proof. I really don't the first 2004R would have died if the torque converter wouldn't have blown apart. I never liked where the first one shifted, 3000 rpm orginally, finally got it to 4300 rpm. I finally got firm shifts after I installed a billet servo. The next one shifted at 4000 rpm, after the Trans Go green spring, along with their big kit with servo, got me 4800 rpm. I have heard issues with shift points even from guys who build a lot of these. Now my first 4L60E(electronic 700R4) got the dreaded weak reverse in my 4x4. This is supposed to be very common. This did have a few miles and towed without a remote cooler. There was a lot of clutch material when I changed fluid. Both of these trans shift at just over 4000 rpm. The 1- 2 shift is noticeable and wouldn't be ideal at the track. I picked up a recent rebuild from a wrecker for it, has been flawless. Everyone who actually build either seem to prefer the 2004R for any sort of performance build. The 4L80E is also an option if you have $$$ and the room. Pretty sure a good junkyard one would hold up fine, not a chance with a 700R4 or 2004R. I couldn't stand running at 2800 rpm at 60 in my Cutlass with 3.42's and 25.5" tire. I run at 1850 rpm with the converter locked.
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Old 11-05-2013, 10:53 AM   #9
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Default Re: 2004r or 700r4

My 700 has been behind my 455 ten yrs. Just a good stock rebuild with a mixture of several shift kits. Its been handling the abuse quite nicely..
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Old 11-05-2013, 11:37 AM   #10
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Default Re: 2004r or 700r4

The 2004R is the oddball trans in the oldschool GM lineup. Honestly I'd go with the 700. More people know it, and there seems to be better parts interchangability and availability with other GM transmissions. Its going to be easier to find someone to work on it too..... JMHO. Honestly, transmissions are the only work on my car I still farm out....I don't have a good grip on them, but most re builders seem very 700r4 biased......
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Old 11-06-2013, 05:19 AM   #11
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Default Re: 2004r or 700r4

Quote:
Originally Posted by matt69cutlass View Post
Bingo! Most shops steer clear of these transmissions due to the fact they don't know how to make one work. I'm convinced thats why most shops suggest the 700. Easier for them to make a buck, even though the 2004R is a better trans.
From my experience, this sums it up. A few trans builders in my area say the 2004R is junk...one of them that specializes in 700R4's had to work on my 442's trans 4 times before he got the clearances right. When you study a 2004R and 700R4 side by side, there are a lot of similarities but the 2004R is a fussy trans that requires specific calibration to work properly. Not many trans shops know this and get frustrated. As already mentioned, in the right hands, the 2004R can be built stronger and has more desirable gearing.
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