700r4 or 200r4

whats the big difference? i know that the 200r4 is the same size as the t350. i have a t350 and thinking of switching. i have a 283 in the car. not going to race with it just a cruzer.
thanks

 

whats wrong with what u got?

 

I am also thinking of the same switch, 38 chevy 350/350 3.00 rear, this is the car I take to long didtant swows.

 

Kind of depends on what you are trying to accomplish. Either would work for you. The 700r4 is a bit longer but the rear mount is further forward. The 2004r fits in place of the th350. You will need a TV set up with either one so that's a wash. The 4L60E is different than a 700r4 as it needs a computer(you may already know this). The first to second ratios are different with the 2004r being less of a jump. 700r4 has a 3.06 first and there is a big jump and loss of rpm between first and second. Most 2004r s have a BOP as well as the Chevy bellhousing bolt pattern, the 700r4 has only the Chevy bolt pattern so one would need an adapter to bolt it to anything but a Chevy(No a prob for you). You will also need a way to get the torque converter to lock up if you go that route.

I like the 2004r better but they each can be built into great units by knowledgeable builders. Not all 2004r valve bodies are the same. There are preferred performance VBs but you might not need one depending on how you will use your car.

 

you'll enjoy that 700R4...we build alot of them .

 

200r4 fan over here, less power loss than a 700, same size as the 350, better gear spacing.

 

I think if you have a low enough rear end gear the huge jump from first to second on the 700R4 will be less noticeable. You're going from a 3.06 to a 1.62, with the 2004R it's 2.74 to 1.57. I never noticed it with highway gears in the car I had my 700R4 in, but my daily is a work truck with a 4.8 V8 and 4L60E (same ratios as 700R4) with 31.6" tires and a 3.23:1 rear...it can't get out of it's own way. I MF that thing every day...it takes forever for the engine to reach it's sweet spot, and it's not all that sweet anyway... By comparison, my personal vehicle is the same platform, same tranny same tires, but with a V6 and a 3.73:1 rear...I'd rather drive that. Not faster, but more consistent shifts.
Go with a lower gear and around a 27-28 inch tire and it won't be as noticeable.

 

If you are thinking the 200 will be a direct bolt in, it will not. They are close to the same length but the rear mount is further back so you will need to adjust your cross member either way.

 

I had a long tail shaft th350, found out it's the same length as the 700r4, just fyi. I had to move my crossmember back but the driveshaft is the same

 

Yeah but the tunnel doesn't need to be reworked either, 1/2 the time the 700r4 will need it.

 

You'll like either one, but there is much more available support for the 700. Both can take abuse, IF built for it.

TCI now offers a 700 valve body that makes them all but indestructable. I would go that way cuz I despise working on trannys.

 

To piggyback on to lilbud's question...I was told the inner workings of the 200 series were made lighter, smaller, weaker,etc... more for 6 cyl applications. Are they durable enough for mild V8 street motors ?

 

Guess Scotty answered it..better write faster..

 

The 200-4R was used in the Buick GNX and Grand Nationals. They'll take abuse. I have a 700r4 in my '33 and wish it was a 200. Better gear spacing.

 

Can I assume a 3.00 rear and 15" tire is too tall to go with an overdrive trans? this is a 350 cruiser.

 

I find more of them in V8 equipped mid 80's wagons. Stock they are fine for mild V8's. With a little work they will take quite a lot of abuse.

 

probably depends on how the engine is set up. If it likes low rpm, it could be fine, and its' a good way to get great highway mileage (with lots of downshifting on hilly highways)

 

Thanks squirrel, just trying to get a little more miledge out of the 350.

 

I have the 200 4R in a 51 Chevy convertible. It was from a Monte Carlo SS. My tranny shop guy got it and rebuilt it. I have driven it only a short distance in front of my home and a couple of the neighbors' homes. Not registered yet. Still It is a nice shifting tranny. Almost seamless, if you know what I mean. I've been through the first three gears and I love it already. I'm running 373s in a 10 bolt rear with 215/75R15 tires.
Dom

 

When looking for a 200r4, is there better ones to be looking for? I know they say the 87 and up 700r4's are better.

 

This link will help everyone out, lots of pictures in it....

http://www.webrodder.com/article.php?AID=426&SID=6

 

If you plan to build your own, the books on 700R4 (87-93) and the 700R4 Update handbook are extremely valuable.

http://atsg.com/cart/catalog/GM_Manuals-5-2.html

The ATSG is a huge help to anyone working on any auto trans or transfer case.

 

exact combo I have also and would love an over drive. great thread

 

TH-200-R4 ID's:
ID Year(s) Application
KZF ** Olds 442/Hurst
CZF ** Monte SS
BRF ** GN/T-Type/Turbo Regals
OZ ** Hurst Olds
OM Olds 350 Diesels
OG Olds 307
BY V-6 252 Cars
AA and AP Cadillac's

http://www.hemmings.com/mus/stories/2006/01/01/hmn_feature9.html




Got this off an OLDS FAQ page and Hemmings.....hope it helps.

Fish

 

i have a th350 and a 200r4 and the 200 bolt pattern on the housing is different then a 350. just for some extra info on that, it would not bolt up to my 350 block but the the th350 did. did the 200 come with differnt bell housings like olds or pontiac?

 

my 200r4 will bolt to any chevy or BOP trans.. perhaps tybo has a non 2oo4r?

I love my overdrive..

 

mid 80's grand prix had them as well, diff. is 700 has the lockup converter and the 200 doesn't

 

I have a 200 4r in my truck, small block olds motor with 235*75*15 tire and a 373 gear, it works real well for me. I dont know what is meant in the post above about not having a lock up converter, as mine has one. but there need s to be 12v to the trans to activate it.

 

the 200r i had in my 85 grand prix didn't have a lockup in it, soo we were going to put it in my brothers 73 z-28 every thing was very close for bolting it right up, except the rear mount and cross member had to be turned around. ( damn pipes) he had a 700 but didn't what to wire it up(i would of had to do it)..

 

Figure out your RPM with an OD before you make the switch. I ran a 3.08 gear and a 200R4 in my Buick.....I would drive around town in (d) and then once up over 70 I would slip it up into (od), anything under 70 was too low of an RPM, especially since most of are running carbs and not injection.

It was kickass for trips to California.....haul ass and got 25 MPG