4 Link rear suspensions - 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> Suspension - Brakes - Steering
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 01-06-2006, 01:14 PM
Registered User
Last photo:
Join Date: Jan 2006
Location: Texas
Posts: 16
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
4 Link rear suspensions

I've started an upgrade to me 57 tbird. The biggest and most radical change is a 4 link fixed rear axle with coil over springs from Comp Eng.
The suspension needs to be aligned - front and rear. The front end is from a '70 full size ford and is aligned in the same way as the original tbird.
The rear end is going to take extra care. There are two links on the top of the axle that angle inward and forward; and two links on the bottom of the axle that are level and pointed straight to the front.
How do these two sets of links work with each other?
And what are the critical adjustments?

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 01-06-2006, 01:17 PM
Henry Highrise's Avatar
Lost in the 60's
Last wiki edit: Removing stuck fasteners Last photo:
Join Date: Dec 2001
Location: Dixieland
Age: 72
Posts: 15,195
Wiki Edits: 4

Thanks: 0
Thanked 18 Times in 16 Posts
Welcome to Hotrodders. This forum is for introductions. You should post your question in the Suspension forum....you will get better response that way.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-06-2006, 06:02 PM
poncho62's Avatar
Hotrodders.com Moderator
Last wiki edit: Streetbeasts links
Last journal entry: at car show
Last photo:
Join Date: Oct 2003
Posts: 17,873
Wiki Edits: 5

Thanks: 45
Thanked 638 Times in 481 Posts
moving it there.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-06-2006, 08:30 PM
BillyShope's Avatar
Philippines Cowboy

Last journal entry: THE TRACTION DYNO
Last photo:
Join Date: Jan 2004
Location: Orlando, FL
Age: 81
Posts: 884
Wiki Edits: 0

Thanks: 0
Thanked 13 Times in 7 Posts
You have what is called a "triangulated" 4link. The angling of the upper link means that you don't need a Panhard rod to control side-to-side motion of the axle assembly.

It's important that the forward ends of the upper links be as close together as possible to avoid binding.

The lower links do not have to be "level" (parallel to the ground). To avoid squatting or rising of the rear of the car during launch, it is only necessary that lines through the upper and lower links, when viewed from the side, intersect on an infinitely long line that passes through the rear tire patch and the intersection of two other lines, one a horizontal line through the center of gravity and the other a vertical line through the front tire patch (the further forward of the rear tire patch, the better). Since parallel lines meet at infinity, one option is to have upper and lower links parallel to each other and to the line which I have just described (the one that passes through the rear tire patch). If the intersection of the link lines is above that line, the car will rise on launch; if below, it will squat.

Sounds like quite a project. Evidently, you're going to be taking it to the dragstrip or you would have stuck with the stock setup. Hope this helps. I would also recommend that you search this site for other threads on triangulated 4links.
Reply With Quote Quick reply to this message

Recent Suspension - Brakes - Steering posts with photos

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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
BROTHERS 4 link for a '49 chevy truck. hiimed Suspension - Brakes - Steering 6 08-25-2013 12:11 AM
this is a saver.... GM build codes TooMany2count General Rodding Tech 24 11-23-2009 09:36 AM
Chevy 1500 Rear Suspension Adjustment after lowering jpd37 Suspension - Brakes - Steering 10 05-31-2005 05:36 AM
TCI vs. P&J's rear four link b.c.kid Suspension - Brakes - Steering 2 11-29-2004 07:52 PM
Removing fenders? Jag Daddy Body - Exterior 3 11-26-2003 04:42 AM

All times are GMT -6. The time now is 02:12 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.