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ghaskett

1956 Buick 322 to 700R4 transmission

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Has anyone hooked up a 700R4 to the 322 nailhead? Interested in your take on it. I have all parts for converting to open drive line, but interested in what's ahead for me on this project.

Thanks.

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Here's some pics of my 1957 Special project. Not a 322 but a very similar 425. Used a Bendtsens adapter that can possibly be seen in the picture. Plan to start a post on this build early next year with more pictures.

 

Gary.

post-96232-0-32358600-1451589510_thumb.j

post-96232-0-89103800-1451589627_thumb.j

post-96232-0-62703300-1451589675_thumb.j

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THANKS for that picture of the adapter kit!!  Might be a little pricey, but, no doubt, "the feel" of that 3.06 low gear and "Buick Torque" might make it worth it!  Might need to reinforce the seat backs??

 

NTX5467

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Based on the amount of space you have under the floor, you might want to look at using a 200-4R rather than the 700-R4.  The 200-4R is smaller in overall dimensions and is an easier fit.  They stand up to what the GNX's can dish out so don't overlook them.  You should also consider the spacing between the gears.. The high geared 3.06 first gear might be okay for a high rpm engine like a SBC, but for a high torque low rpm engine like a nailhead, you want the gears closer together.  Art Carr, PATCO, and other firms build really good 200-4R transmissions.  Just make sure that if you go that way, you get all the parts that go with a Chevy trans or all the parts that go with the BOP trans.  The way the converter bolts to the flex plate is different, and the parts don't swap. 

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Hi everyone...first time here. Putting together info on mating a 1956 322 Nailhead to a 700R transmission ...but I see that RivNut suggested the smaller 200R which is better suitable for the 322s torque.

 

So thanks for that and also the Art Carr at Patco referral RivNut.

My next question is the 200R splines to the 322 crank...is there a difference between the 200R and the 322? I imagine there is.

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Mating the engine to the transmission is easily done with an adapter.  That's no problem.  Your problem will be in mating the transmission to a drive shaft.  Your old Dynaflow mated to the drive shaft via a torque tube.  The torque tube is an integral part of the rear suspension.  It locates the rear end.  You'll need to connect the 200-4R to an open drive shaft.  In order to run an open drive shaft, you'll nee rear trailing arms. and all of the other paraphernalia that goes with it.  There are a couple of threads about this in the forum somewhere.  You can probably find them be doing a search.  Russ Martin out in Grass Valley, CA sells a sub frame connector that you can use to properly locate the open drive shaft in your car.  Good luck.

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I used a 2004R under my 37 Special for the stated size reason. Would have had to do serious trimming of the X member for a 700R4. Used a Bendsten's adapter behind a 263 straight eight. Without the torque tube I had to make up trailing arms to position the open drive rear end because the 37 leaf springs have swinging shackles at BOTH ends.

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This is my first project, I have a 56 Super, also interested in getting a 700rR or 200-4R transmission. Why doesn't anyone connect to the torque tube with a new transmission?

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21 minutes ago, Scott W said:

This is my first project, I have a 56 Super, also interested in getting a 700rR or 200-4R transmission. Why doesn't anyone connect to the torque tube with a new transmission?

Get a service manual and then get under the car to understand how the torque tube set up works...then you will see that it cannot be done.

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58 minutes ago, old-tank said:

Get a service manual and then get under the car to understand how the torque tube set up works...then you will see that it cannot be done.

 

 Tain't easy, or cheap, but can be done..Sorta.:D

 

  Ben

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Posted (edited)

Basically, a torque tube is also the part of the chassis that locates the rear end. A car equipped with a torque tube does not have rear trailing arms.  As mentioned above, crawl under your car then compare it to a mid 60's or later. "A picture (in you mind) is worth a thousand words."

 

For a few hundred $$, Russ Martin, Centerville, CA, will sell you a torque tube eliminator kit.  It's basically a set of subframes with rear trailing arms.

Edited by RivNut (see edit history)

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Quick question for one of my friends in Cuba 56 Buick 322 700 R4 Transmissions going on the back of it need to know what type of starter I should use for this application

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