1966 impala - Impala Tech
Welcome Forum New to the site? Introduce yourself.

 
LinkBack Thread Tools
post #1 of 4 (permalink) Old 03-25-2012, 12:39 AM Thread Starter
 
 
Join Date: Mar 2012
Location: Michigan
Posts: 7
 
Smile 1966 impala

okay I have a 66 impala that has a 2 speed powerglide I got a 700 r 4 I want to put in I bought the aftermarket cross member how many inches do I need to cut off the driveshaft and it is the original yolk going to work on the 700 r 4 or what other modifications do I need to do to make this work somebody please give me a solution thanks and have a great day
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 03-25-2012, 10:06 AM
BA.
Moderator
 
Join Date: Aug 2008
Location: Miamisburg, Oh.
Posts: 3,165
Blog Entries: 15
 
I don't have your info but I can tell you that it's been discussed on here quite a few times, you might want to try the Search function while you're waiting for a reply.

HOW A NOVICE REBUILDS A 66 IMPALA CONVERTIBLE:
http://www.impalas.net/forums/blog.php?u=1432
BA. is offline  
post #3 of 4 (permalink) Old 03-25-2012, 10:34 AM
Moderator
 
Join Date: Jan 2006
Posts: 12,456
 
You measure for the correct drive shaft length. There is no gaurantee of a correct fit other wise as the length changes with the ride height (some people actually enjoy scraping over every speed bump in the road and make their cars lower than stock). If you don't know how to measure for a drive shaft Denny's Drive Shaft has a page that explains the procedure:

http://www.dennysdriveshaft.com/how_to_measure.html

As to the rear yoke, it uses the same 27 spline out put shaft that the PowerGlide, the TH350, the manual three speed, and the manual four speed (both the Muncie and the Borg-Warner T-10) do. Only the TH400 and the new manual four and five speeds use the larger stronger 31 spline out put shaft and front yoke.

You have an aftermartket transmission cross-member so that will acount for the mount being moved to the rear (because of the extra fourth gear in the TH350 case that turns a TH350 into a 700R4) so that won't be an issue. All you need now is linkage to find those two extra gears (longer rods) and a gear selector plate to go in the dash (or on your console) so that you know what gear you are in. That assumes you want it to look stock. If your are going for the ProMod look you just bolt a ratcheting Hurst reverse lock out shifter on the floor and drill a hole for the cable to go through.

The last and most critical thing to do has to do with the TV adjustment. Get this wrong and you will be buying another 700R4 transmissin inside of a day or less. You need a sturdy (not cheap) mounting bracket to secure the cable. If you have a Rochester carburetor youi are in luck as there are literally millions of good stock ones in salvage yards waiting to be picked up. If you have a Holley or a Carter (aka Edelbrock) carburetor then you have to buy an expensive strong (you are standing on this part) bracket to keep the cable end where it needs to be.

A bracket is only half of the problem. The Holley or Edelbrock carb doesn't use a Chevrolet throttle arm. This is because Chevy didn't use a 700R4 with Holley, only a manual trans or a TH400; and because Chrysler (MOPAR) used Carter carbs as their stock carb (The Holley has Ford throttle arm because Ford sourced Holley as their OEM carb vendor). That means you have to modify the throttle arm to make it work with a 700R4.

Here is a web site or two that explain this issue.

http://transmissioncenter.net/700R4_Swap_Info.htm

This bracket only allows the throttle to bolt up but can be modified:

http://www.holley.com/20-121.asp
http://www.holley.com/20-95.asp


Here is someone talking about the brackets




Big Dave
Big Dave is offline  
 
post #4 of 4 (permalink) Old 03-25-2012, 08:48 PM Thread Starter
 
 
Join Date: Mar 2012
Location: Michigan
Posts: 7
 
thank you guys for all the help but I still don't know how many inches need to be cut off the driveshaft my car ride in a regular height stock height and I'm really not sure how to measure a drive shaft if somebody who has done this before to a 66 in pile up please give me a direct measurements I've heard 3 inches or 2.75 and once again thanks to everybody gave me the good advice have a great night and god bless
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Impala Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome