1969 el camino 700r4 transmission swap - Chevelle Tech
Transmission & Driveline Transmissions and Differentials

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 16 (permalink) Old Jun 29th, 10, 12:17 AM Thread Starter
Tech Team
Garrett
 
Join Date: Oct 2006
Location: Charlotte
Posts: 110
Question 1969 el camino 700r4 transmission swap

I have done a lot of research on this swap and I have heard that converting a current TH350 to a 700r4 a lot of guys are saying its some of the best money they have put into their cars. I was wondering because of a lot of speculation on the changes in internal design between many years on what the best year range to get the transmission to slide under my 69 el camino.

-I read somewhere that the pre 1985 ones are junk because of pump failing issues. Is this true or a rumor?

-Shortening the drive shaft by 2 and 7/8" is required but does a '71 nova driveshaft fit perfect? What year would require no fabrication if any do fit?

-Other than having to slide the crossmember back by 2 and 7/8" as well is there any other fabrication that any of you have had to do to make this transmission work?

Thanks as always guys you all are a huge time saver and help me so much with quick solutions to my problems!

1969 Red El Camino 350CI 700-R4 GM10 bolt w/331 gears
69camino is offline  
Sponsored Links
Advertisement
 
post #2 of 16 (permalink) Old Jun 29th, 10, 7:59 AM
Tech Team
Jon
 
Join Date: Nov 2007
Location: Erlanger, KY
Posts: 711
Re: 1969 el camino 700r4 transmission swap

I would get a later style with the 31 spline input shaft because there are more available torque converters for that model. I put one in my 66 and it lowered my 70 MPH RPM by 1000. I am getting a new aluminum drive shaft if you are interested my old drive shaft might fit. PM or e-mail me. You have to get the correct attaching brackets for the TV cable and a lock out switch for the converter.

66 Chevelle-Web Page
Parts For Sale
Team Chevelle #5380
ACES #8896
09 Corvette
NCM#6320 (10 year member)
2010 Honda Crosstour
jonathanch is offline  
post #3 of 16 (permalink) Old Jun 29th, 10, 10:03 AM Thread Starter
Tech Team
Garrett
 
Join Date: Oct 2006
Location: Charlotte
Posts: 110
Re: 1969 el camino 700r4 transmission swap

I have been doing research and a lot of people are saying that the 700r4 transmission is great for my 1969 el camino but a lot of people have recommended I go with the 200-4r transmission because it is a longer lasting more durable transmission than the 700r4. What are your thoughts on this?

1969 Red El Camino 350CI 700-R4 GM10 bolt w/331 gears
69camino is offline  
post #4 of 16 (permalink) Old Jun 29th, 10, 6:01 PM
Gold Founding Member
Ron
 
Join Date: Aug 1998
Location: Murfreesboro,Tn. USA
Posts: 5,072
Re: 1969 el camino 700r4 transmission swap

Quote:
Originally Posted by 69camino View Post
I have been doing research and a lot of people are saying that the 700r4 transmission is great for my 1969 el camino but a lot of people have recommended I go with the 200-4r transmission because it is a longer lasting more durable transmission than the 700r4. What are your thoughts on this?
I cant say here, just that I love my 700r4 now that I have it dialed in. I have a healthy 427 but I dont race so I cant say how durable it would be if I did.The OD drops my rpms 1000 in 4th gear from 3000 to 2000 at 72mph with 3.31 rear gears

70 Chevelle SS396 (496) Straub roller, M21
69 Malibu convertible
95 Z28 Convertible T56 6 speed
TC #54 Gold

69 - Top down
69 Top up
new wheels
70 side
On Gearz
ToocoolZ28 is offline  
post #5 of 16 (permalink) Old Jun 29th, 10, 6:16 PM
Lifetime Premium Member
Rich
 
Join Date: Apr 2009
Location: Cleveland, OH
Posts: 4,773
Re: 1969 el camino 700r4 transmission swap

I eventually chose the 700r4 because of the hotter 1st gear. I love it, but I'm running a 283 and never racing it. The 2004R's can be built to stand more abuse. Either way, I love the damn OD...

Rich

---1965 Malibu SS Ragtop 283/416 heads/700r4
---2009 Corvette Coupe

"Whatever it is, I'm against it." --Groucho Marx
richietables is offline  
post #6 of 16 (permalink) Old Jun 29th, 10, 6:27 PM
Lifetime Premium Member
& Super Mod
 
Join Date: Apr 2005
Location: North America
Posts: 15,700
Re: 1969 el camino 700r4 transmission swap

http://www.tciauto.com/Products/TechInfo/trans_dims.asp
Mike is offline  
post #7 of 16 (permalink) Old Jun 29th, 10, 9:22 PM Thread Starter
Tech Team
Garrett
 
Join Date: Oct 2006
Location: Charlotte
Posts: 110
Re: 1969 el camino 700r4 transmission swap

Mike that's a really great link I appreciate that I'll measure any transmission I pull out of the junk yard that is a 700r4. I was also wondering how do you wire that 12-volt torque converter locking switch. This is the only area I am seriously scared to mess up because if I do so I'll blow the transmission. Can you guys give me some tips on how to wire the lock-up switch thingy! I appreciate all this help I want this process to go as quickly and smoothly as possible and all this info is helping immensely.

1969 Red El Camino 350CI 700-R4 GM10 bolt w/331 gears
69camino is offline  
post #8 of 16 (permalink) Old Jun 29th, 10, 9:35 PM
Lifetime Premium Member
& Super Mod
 
Join Date: Apr 2005
Location: North America
Posts: 15,700
Re: 1969 el camino 700r4 transmission swap

Link was for mounting and drive shaft dims but use it as you see fit.
Here's some info on cable and electric install for 700r4 - http://purplesagetradingpost.com/sum...o/700R4p1.html

Here's ID info - http://www.hotrodders.com/articles/T...ification.html

You might talk to jakeshoe (username) about a 200-r4.
Mike is offline  
post #9 of 16 (permalink) Old Jun 30th, 10, 5:25 PM Thread Starter
Tech Team
Garrett
 
Join Date: Oct 2006
Location: Charlotte
Posts: 110
Re: 1969 el camino 700r4 transmission swap

Last question on this topic(hopefully) I was told that the post 88 700r4's are the best to go with but at the same time you have to make it a non electric ran transmission. I read somewhere that you can for about $20 have the electronics taken out or take them out. How do you make it a non electric transmission?

1969 Red El Camino 350CI 700-R4 GM10 bolt w/331 gears
69camino is offline  
post #10 of 16 (permalink) Old Jun 30th, 10, 6:03 PM
Tech Team
Jon
 
Join Date: Nov 2007
Location: Erlanger, KY
Posts: 711
Re: 1969 el camino 700r4 transmission swap

Garrett I think you have some bad info. I have a 91 700R4 and the only wire to it is to unlock the converter. When you get into OD the converter locks up for maximum efficiency. When you slow down you want the converter to unlock so that it slips and does not push the car. All you need is late model S10 brake light switch. Looks just like your Chevelle switch but has 4 terminals. two the brake lights and two to run 12 volts to the converter. When you step on the brakes you brake the circuit to the converter and it unlocks. I can try to find the number for the switch. I just went to my local Advance Auto and asked for a n S-10 switch.

66 Chevelle-Web Page
Parts For Sale
Team Chevelle #5380
ACES #8896
09 Corvette
NCM#6320 (10 year member)
2010 Honda Crosstour
jonathanch is offline  
post #11 of 16 (permalink) Old Jun 30th, 10, 7:40 PM Thread Starter
Tech Team
Garrett
 
Join Date: Oct 2006
Location: Charlotte
Posts: 110
Re: 1969 el camino 700r4 transmission swap

From all the rebuilt videos and what not that I have seen show roughly a set of 3 or 4 wires that go from one side of the valve body to the other. Those are the wires I am wondering how to remove to make it so the transmission does not run on a ECU. Or do those wires control the torque converter?

thanks guys for the help!

1969 Red El Camino 350CI 700-R4 GM10 bolt w/331 gears
69camino is offline  
post #12 of 16 (permalink) Old Jun 30th, 10, 7:43 PM
Lifetime Premium Member
& Super Mod
 
Join Date: Apr 2005
Location: North America
Posts: 15,700
Re: 1969 el camino 700r4 transmission swap

Those 4 wires are shown in the link I posted so you could see how to wire it up.
Mike is offline  
post #13 of 16 (permalink) Old Jun 30th, 10, 8:00 PM
Tech Team
Jon
 
Join Date: Nov 2007
Location: Erlanger, KY
Posts: 711
Re: 1969 el camino 700r4 transmission swap

You don't need an ECU with a 700R4. GM didn't use ECU till the 4L60 series transmissions.

66 Chevelle-Web Page
Parts For Sale
Team Chevelle #5380
ACES #8896
09 Corvette
NCM#6320 (10 year member)
2010 Honda Crosstour
jonathanch is offline  
post #14 of 16 (permalink) Old Jul 1st, 10, 7:53 PM Thread Starter
Tech Team
Garrett
 
Join Date: Oct 2006
Location: Charlotte
Posts: 110
Re: 1969 el camino 700r4 transmission swap

Ok guys I am going to go get my transmission to rebuild tomorrow. While looking through a haynes manual about how to rebuild the transmission and now I am wondering about my speedometer cable. Is there a universal speedometer cable that I can get that will fit both worlds(my old 69 dash with the new trans). I figure I need to get one that will fit into the transmission and will have the proper adapter to slide onto my fitting on my gauge cluster.

I appreciate it guys this help is tremendous!

69camino

1969 Red El Camino 350CI 700-R4 GM10 bolt w/331 gears
69camino is offline  
post #15 of 16 (permalink) Old Jul 1st, 10, 8:39 PM
Gold Founding Member
Ron
 
Join Date: Aug 1998
Location: Murfreesboro,Tn. USA
Posts: 5,072
Re: 1969 el camino 700r4 transmission swap

I used my stock speedo cable with my 700r4. I just bought the correct speedo housing and gear here
http://www.transmissioncenter.net/highperflist.htm

70 Chevelle SS396 (496) Straub roller, M21
69 Malibu convertible
95 Z28 Convertible T56 6 speed
TC #54 Gold

69 - Top down
69 Top up
new wheels
70 side
On Gearz
ToocoolZ28 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevelle 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. Note, you will be sent a confirmation request to this address.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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

Advanced Search
Display Modes
Linear Mode Linear Mode



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