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Discussion Starter #1 (Edited)
Ok so here is the deal. My car (62impala 4dr sedan) right now has a powerglide with a 283. I'm looking to swap out the powerglide for a 700R4 for MUCH better gas mileage, better performance...you get the idea. So I'm going to get the transmission pretty soon but first I have some questions that I need help with. Will the 700R4 bolt up to the 283 with no modifications? I've read somewhere that the crossmember will need to be moved back but I dont remember by how much. I also read the driveshaft needs to be shortened. I'm also assuming the trans tunnel will need some modifications to fit...could it be just a height issue or would the tunnel need to be lengthened? Another one is how does the computer control work? I'm assuming that it will not use a kickdown lever but I'm curious how the transmission will know when to shift/downshift? Also is a factory column shift compatible with the 700R4? I know I would need to make linkages but I'm wondering if the factory column could be reused? I dont really know that much about transmissions but this is something that needs to be done and I think it would be something cool to learn about. Anybody know of any sites that would have a full tech explanation on doing this swap? any help is appreciated.

Hunter
 

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http://www.geocities.com/crosley_az/700id.htm

Start here. Crosley is a regular on this board and has a wealth of knowledge in this area.

There's a cable that hooks to the carb linkage that shifts the 700r4. It has to be hooked up properly. Look here for proper dimensions and geometry.

http://purplesagetradingpost.com/sumner/techinfo/700R4p1.html

Your column linkage will probably work with a little modification.

The tranny should bolt up to the 283.

I think the tunnel should be fine.

You'll have to move the crossmember back a bit but it's not hard to do after the tranny is in and propped in place.

Take some before and after measurement so you know how much to shorten the driveshaft. I think the original slip yoke will work but someone else here might clarify.

You'll also need a kit to wire up a torque converter lock up. Look here:
http://bowtieoverdrives.com/catalog/catalog.php?Action=GETSUBCAT&CATID=OA1A3

You'll definately need better gears at the rear end if you've still got stock gears.

With the proper research and preparation this is a do-able project for a backyard mechanic.
 

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For what it's worth: A turbohydramatic 200-4R will accomplish the same goal, but it wont require a driveshaft mod.
I've replaced the 283/PG combo in my 64 El Camino with a ZZ4 crate motor and a TH200-4R and it's a pretty simple swap.
I had to move the trans X-member about 4" to the rear, but it was no problem. Just welded some angle iron tabs to the frame in the correct spot.
JA
 
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