700r 4 tcc sol wiring - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Transmission - Rearend
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-11-2010, 01:21 PM
Registered User
 
Join Date: Oct 2010
Location: northern MN
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
700r 4 tcc sol wiring

The 3-4 gears went out on my 88 gmc 8700 r 4. Fluid is burnt black. I installed a used tranny from the junk yard. The shift shaft bracket was different. I changed that to my origanal one. I pulled the pan to install a new filter and the wiring had been cut out. I double checked with the tranny I pulled out. The one pulled out has a white electrical plug on right side behind the TV cable. Inside it has one plug in switch and 2 round switched before the wiring ends up at the tcc sol. The newest installed has the white connector behind the TV cable but has 4 round switches. The last one sits over the tcc Sol. I do understand that my truck,88 GMC 1500 4x4 auto, comes with 2 motors and two trannys that are interchangable in any fashion. Can anyone give me any insight into this electrical part? I want to get a new one at the dealer but am unable to answer a lot of questions on the tranny. Any diagrams?

many thanks,

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-11-2010, 02:47 PM
SSedan64's Avatar
Registered User
 
Last photo:
Join Date: Dec 2007
Location: Macon, GA.
Age: 50
Posts: 6,016
Wiki Edits: 0

Thanks: 0
Thanked 46 Times in 46 Posts
May be a Temp switch, the Round switches that screw into Valvebody are Pressure switches. Temp switch prevents TC Lockup at low temps and and some force Lockup at very high temps.
There are many different wiring Combos. You should be able to just make it match the wiring from your old Trans. May have to remove switches & plug a few ports. 1/8" NPT plugs.
Lots of good 700R4 wiring Info here >> http://www.rowand.net/Shop/Tech/LockupTCCWiring.htm
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-11-2010, 10:07 PM
Registered User
 
Join Date: Feb 2010
Location: CA
Posts: 22
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
700r4 4th gear lock up

Hi
does the tranny go into 4th gear at all, do you feel all 4 gears sift?
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-12-2010, 12:43 PM
Registered User
 
Join Date: Oct 2010
Location: northern MN
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
700 r 4 trans

I talked to a tranny expert here in Duluth and he said the transmission would run fine with no wiring harness. It is just an electrical connection to force lock up instead of fluid pressure. He said it will still lock up using fluid pressure. Sound crazy or real to anyone? I have not had the truck on the road with this transmission in it. I want to find out if it will run normal without the electrical connections.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-12-2010, 10:18 PM
SSedan64's Avatar
Registered User
 
Last photo:
Join Date: Dec 2007
Location: Macon, GA.
Age: 50
Posts: 6,016
Wiki Edits: 0

Thanks: 0
Thanked 46 Times in 46 Posts
There's a kit for the 700R4 that uses Hydraulic pressure alone to lock the Torque Converter Clutch but, unless this is installed or you correct the TCC wiring it wont lockup on it's own without an electrical connection.

TransGo Part# 700-LU >> http://www.transgo.com/valve_bushing.php

I'd just swap the Harness from your original Trans to the new one.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-12-2010, 10:25 PM
Crosley's Avatar
Hotrodders.com Moderator
 
Last wiki edit: T-350 rebuild tech
Last journal entry: Bar under the dash
Last photo:
Join Date: Nov 2002
Location: ... USA
Posts: 8,075
Wiki Edits: 1659

Thanks: 324
Thanked 97 Times in 94 Posts
Quote:
Originally Posted by jwwoodsman
I talked to a tranny expert here in Duluth and he said the transmission would run fine with no wiring harness. It is just an electrical connection to force lock up instead of fluid pressure. He said it will still lock up using fluid pressure. Sound crazy or real to anyone? I have not had the truck on the road with this transmission in it. I want to find out if it will run normal without the electrical connections.

Find a new trans person... In the late 1980's the fluid lock up assembly in the valve body was removed and aluminum plugs installed.. and later the whole passage was not machined in the valve body casting = completely gone.

if you do not have the correct valve body , the kit for hydraulic lock up of the converter clutch can not be used
__________________
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.
Reply With Quote Quick reply to this message

Recent Transmission - Rearend posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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:

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
4L80E diesel computer 5foot2 Transmission - Rearend 2 04-09-2005 12:48 PM
(airworld2) Cheap wiring for 700R? manoso Transmission - Rearend 1 05-24-2004 09:05 PM
700R wiring / to connect or not? manoso Transmission - Rearend 6 05-24-2004 01:36 AM
700R wiring on non computer 1962 truck manoso Transmission - Rearend 2 05-18-2004 01:12 PM
wiring in a late model 700r tranny TooMany2count Transmission - Rearend 5 09-28-2003 07:00 AM


All times are GMT -6. The time now is 06:53 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.