Engine/Trans swap 305/7TK - 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 09-16-2001, 05:24 PM
Registered User
 
Join Date: Sep 2001
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post Engine/Trans swap 305/7TK

Hi Guys
I'm new to this and have a lot more questions than answers!
Bought a 49 Chevy truck I a=m restoring and am in the process of upgrading the drivr train and Chasis. I found a 87 full size Blazer with a 305 and 4WD auto, which I plan to slip under this 46.
Question I have is what has to be done to the tranny to get away from the computer?
There are two electrical connectors to the tranny. One is a 2 wire and goes into the 4WD case. I assume this is nothing more than the indicator to indicate in $wd or not?
The 2nd lead is a 4 prong, 3 wire lead into the driver's side of the tranny body. Do I need this and what is it's function.Sure would appreciate some pointers.
If you don't have answers but can steer me in another direction, I'd appreciate that too.
Thanks Guys!!! hcalteaux@hbci.com

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-19-2001, 04:39 AM
Tom Tom is offline
Member
 
Join Date: May 2001
Location: agawam ma
Posts: 323
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

The plug in the transfer case is for the indicator you don't really need it the plug in the tranny is for the lockup ,in the early 80s chevy trucks had no computers but had lockup trannys.There is a switch on the firewall in these trucks with wiring for the trans that operates off intake vacume that makes the converter lockup like a electric vac modulator.got to be a million of them in the boneyards
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-21-2001, 08:02 PM
Guy Guy is offline
Registered User
 
Join Date: Sep 2001
Location: California
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

If that trans is the over drive model,the over drive is controled there
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-25-2001, 09:38 AM
Phat's Avatar
Toy builder
 
Last photo:
Join Date: Sep 2001
Location: COLD NORTHEAST
Posts: 223
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

Hank Not to disapoint you but have you looked at a 49 with a blazer chassis under it? First the chassis is to short.Next the wheels hang out and does not look very good.Out of all the ones i have seen(and there are tons of them around),only one guy got it correct.He did a lot of body work and widened the front fenders. The rear is not bad at all,its just the front hangs out of the fenders pretty far.Just wanted you to know before you started.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-25-2001, 07:18 PM
Registered User
 
Join Date: Sep 2001
Location: warner robins ga
Posts: 2
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

i do know that the plug on your tranny is what controls the the lock up of the comvertor and the you will need the plug of the wire ing harness there are two ways to make this work 1 painless wiring makes a kit and will control everything 2 you can make your own switch to control the converter lock up but i dont uderstand what the problem is you are using the frame motor and trans just go ahead and you the wiring harness-easiest
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-01-2001, 09:08 PM
Member
 
Join Date: Aug 2001
Location: north carolina
Posts: 37
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

I have had some luck with the late model front independant suspension by simply narrowing it , I had a driveling shop near me shorten the drive axels , this doesn't interfear with the cv joints . It compensates for the narrower frame of the 47 You cant go much shorter but its do able . I think wheel offset should be looked at too . We used the origional frame with alot of modification and it worked out well . As far as doing away with the computer , If you intend to drive it regular , leave the computer and upgrade it with a chip . The trans will work better , the engine will make more power and if you keep the wiring from the truck the engine came out of you can take it to a chevrolet dealer or garage and have it put on a machine when it screws up . We kept our computer and took it to a garage when it lost power . They looked up the year model we used to get our driveline from and told us it needed a mass airflow sensor , a quick fix . On thing I have found out about doing a custom is if Gm made it to work together , use it . It makes general repair and maintenance simple . There is nothing wrong with doing away with a computer , I hate them , but I love how the truck runs with one and the gas milage differance is enough to put up with a little aggravation of installiong a modified wiring harness ,, ,painless can help . My advice is dont be in a hurry and be willing to put together and pull apart till it all fits right . Get a factory wiring schematic on the doner truck so you will know which wires are computer and which ones are expendable . Besides , the electronic dash from some of these new trucks can be integrated into an early dash rather nicely . Have you considered putting ac on the truck , the computer will make that work nicely to , it did for us .
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:
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



All times are GMT -6. The time now is 12:09 AM.


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.