I would like to go to a 4 spd auto and the 200R4 apparently bolt up with no driveshaft mods. 700R4 requires mods however they were built for V8 apps. Anybody using a 200R4 successfully behind a reasonably stock small block?

The 200r4 is real good.Was used in the GN BUICK seen those cars run 9 sec. passes on nitrous. It will hold a small block.

What rear gear do you have? With a 700r4, you have a very low first gear and may not need to change them, resulting in more of an "overall" overdrive. I question wether or not a "stock" 2004r will hold up to a V-8. I know a modified one will.

I have a new Eaton posi 4.10, Im thinking with a turbo 350 its going to be very buzzy at highway speed. So its either swap the tranny which is newly rebuilt as well or rearend gearing. 700R4 is much more common and has V8 application however 200R4 requires no driveshaft mods which I fear might lead to vibration issues etc.

I believe the 200r requires crossmember mods due to the tranny moun being mch further back on the xmission. I installed the 700r4 in my '79. the first 2 holes in the crossmember lined up with the back 2 holes in thesubfame. and all i had to do was slide the crossmember back to the second set of holes, and drill 2 new hole. i tooksome before and after measurements between the tailshaft of the xmission , t350 vs 700r4, took the driveshaft to a driveshart shop, and for $50, they shortened it by 3-1/4 inches. it had a better balance after they finished than it had before they cut it. to me, it's a lot easier to shorten the driveshaft than to hack and weld on your existing crossmember. Try to find an '87 or newer 700r4, they're much better than than the older ones.

The 200R4 uses a turbo 400 crossmember.

I know of quite a few people that run a stock 2004R behind V8's. IMO, I dont think you will have a problem. I think you will be more than happy.

If you read the input from the automatic consortium (the guys in the business) you will see that their recommendations are more for a 200 than for a 700/4L80 any day of the week. The 700 is strong but eventually it WILL break.....guaranteed.

A friend of mine has a repuatable trans shop (he builds 200's for the 900HP crowd) has written this with input from all the other guys in the aftermarket/high performance trans business:

http://www.drwtransmission.com/thm_200-4r.htm

And concludes this about the vulnerable 700-R4:

http://www.drwtransmission.com/4L60E.htm

There is a lot of good information on his page if you surf it. The consortium is composed of the shops that have been the major players in the parts/service/fabrication end of automotive transmissions. The cool thing is that they all know each other, although being seperate shops, they work together to make parts and share ideas to make these things live. Great bunch of guys!

Good luck!

Although I'm still not sold on 2004r's (in the stock form). It's 200 lovers vs. GM. I would recommend a 200 with the 4.10's. If you had about 3.08's I would go with the 700r4. I have run a 700 with 4.11's and the first gear is way to low. Your driveshaft should be better than b-4, with a good shop, although with the 200 you won't need to change it. Make sure you install a cooler with either. Good Luck.

I agree with TJS69. With 4.10's and a 700r4 you'll have the equivalent of 5.01's with a TH350. From a stoplight you'll be in second gear before you get under the light. However, most of the trans shops around here seemed to snarl at the 2004r in stock form so that's why I went with a 700r4. At the time I wasn't as aware of the aftermarket 200's that were available. Tough decision, good luck.

[ 02-25-2003, 08:06 AM: Message edited by: rojo ]

I have a 2004R in my 69. It is behind a 383 that makes 375HP(guestimate) it works great. As posted above you will need a TH400 crossmember($54 from Ricks) or make something up yourself. You'll also need a TH350 to 2004R conversion kit from Ricks that includes the brackets, shifter detent, etc that you'll need. There are a couple of other things that you will need, but that wasn't your question....

I have ZERO complaints about the 2004R over the past 8 months or so and I think that it has performed really well!! I have a 12 bolt posi with 3.73 gears and run about 2100 RPMS at 70 MPH! I think that the 383/2004R/12 bolt 3.73 combo is great!

[QUOTE]Originally posted by rojo:
[QB] I agree with TJS69. With 4.10's and a
700r4 you'll have the equivalent of 5.01's with a th350.


Your first gear ratio would be 3.07x4.10=12.587 very low. With a 200R4 it would be 2.74x4.10=11.234 still to low. 3.73 would be better 2.74x3.73=10.220. Th350 2.45x4.11=10.069.
200R4 with 3.73 best combo. Like Paulm has.IMO

If I were to put ANY OD trans in my car, I wouldn't get a stock unit. You're gonna beat on that trans more than the factory had in mind when it was built.

The 200 is just as strong as the 700 when modified. Also, when modified, you get peace of mind, and it will last alot longer.

Originally posted by paulm:
As posted above you will need a TH400 crossmember($54 from Ricks) or make something up yourself. You'll also need a TH350 to 2004R conversion kit from Ricks that includes the brackets, shifter detent, etc that you'll need. There are a couple of other things that you will need, but that wasn't your question....
Hey Paul, I've got 2 questions....

1. What else is needed?
2. Did you have a short tailshaft on your TH350?

200R4 is the same length as a TH350 with a 6" tailshaft.Earlier in the thread it was said 700r4s were for v8 applications it made it sound like there were no v8 200r4s but Monte Carlo SSs , 442 V8 Grand Prix had the 200r4 in them. I made reference to the GN Buick because of the HP & performance of these cars.

I currently have a TH350 with a "short" tailshaft. (I guess it's the short tail; only about an inch sticking out where the driveshaft slips onto)

What modifications would I need to do to make this work?


Sorry for all the questions, this is an unfamiliar area for me and I can't seem to get much help from the local transmission shops. :mad:

[ 04-08-2003, 07:00 AM: Message edited by: KWIK 69 ]

chicane67 - The problem is they(the folks you referenced) is behind times! There are hardened input shafts and hardend drums available for the 700R4. We've had them behind our cars now for 2.5 years and they work great. My wifes camaro runs low 11's and I run low 12's. We have well over 800 qtr mile passes on them plus several thousand street miles. I believe, based on my experience, that the 700R4 will last behind a very stout street/strip car if built right.

Lee

KWIK69,

Here is what you need for this swap. (T350 to 2004R) I just did it in my 69 convert.

A t400 crossmember will work. You need to remove the mounting pad from it and reweld it about an inch toward the drivers side IF USING A SMALL BLOCK. Should be OK as is if you have a big block and are using big block frame/motor mounts.

Your T350 driveshaft and yoke will work without mods.

You need to rework your stock shifter with a shiftworks kit or use an aftermarket shifter.

T350 cooler lines will work with a little re-bending.

There is no vac modulator, so you can pitch your old line. Block off the vac fitting on the intake.

I recommend you run the lock-up converter - you'll need to make sure the trans is wired internally for lock-up - you also need external lock-up wiring.

It is critically important to have a properly installed and adjusted TV cable. Your trans will self destruct without this system being properly set up.

Go here: www.700r4.com (http://www.700r4.com) for lots of good info. Look at their TV EZ kit.