Looking for a 200-4R to replace Turbo400

[Ken73]

I have a '73 Corvette with a Turbo 400 in it. I'd like to upgrade to a 200-4R (partly because of the overdrive, and partly because of the lower reciprocating weight.) I already have the correct Corvette yoke to fit it, but I need the transmission itself. I'm fully capable of rebuilding it also - I've rebuilt my 700-R4 in my '82 Corvette in a week and it works great.

Here's what I know outright; the GN's had the best version - the differences being the governor (replaceable,) servo (replaceable,) and the valve body (not replaceable.)

That being said - is it entirely necessary for me to use a GN transmission for what I'm doing? The motor I'm building will probably make about 300hp N/A, and about 400+hp with a basic nitrous kit. Are there such major differences in the valve body that can't be compensated for with a shift kit? Could I yank a 200-4R from a V6 Camaro and use a shift kit to change things up enough to work well?

The car will be a "weekend" driver - I'd like to hit 12's on the track with nitrous. I'm just trying to be reasonable with it but have some fun with it.

 

[chris718]

ken ,valve body type will depend on maximum ngine speed and final drive ratio.based on what your saying you can probably use a aaor cr code.if you need to know what type of parts will be necessary at your h p level read the stage 1 build up on my site.see url below .go to gm 2004r stage 1 .you can then gather the parts necessary from us or anyone on the site to start the project.

 

[Ken73]

Final engine speed will probably be around 6000RPM or so. I don't think I'm going to go over that by much. I have 3.55 gears (original/stock) in the rear.

What vehicles did the AA or CR codes come in..? I'm going to the junkyard today and I figured I'd look at V6 Camaros..

Thanks for the reply!

 

[chris718]

you will be better off with a gn or mcss core.we stock the valve bodies if you need one.if you find a aacode its cadillac 2004r or cr is monte carlo ss non ho motor.camaro v6 is not what you should be looking for.wrong transmission.

 

[Ken73]

Yea I found that out today at the junkyard. All the V6 Camaros I found had 700-R4's in them - not a one of them had a 200-4R in it. I found ONE Cadillac that had a 200-4R in it but didn't bother to pull it. I figured I'd wait until I had more information.

How much are the valve bodies you're selling?

 

[chris718]

they are in the advertisers section of this site for 299.