Car crabbing ? - Hot Rod Forum : Hotrodders Bulletin Board -- 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 02-24-2004, 09:34 AM
Last photo:
Join Date: May 2003
Location: Baton Rouge, LA
Posts: 42
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Car crabbing ?


Just got back from the alignment shop.

Some bad news I guess.

I had them check the alignment of all four wheels after completing the two-wheel alignment and to my dismay they found that the rear end of my car is out of alignment.

The right rear is -.9 degrees toward the rear of the of the car and the left rear is out a like amount. So the rearend is

/---/ like that relative to the car. My car is a unibody car.

I did recently replace the rear leaf springs. I thought I had everything lined up.

Question is:

Does 1 degree of tilt need major frame straightening or is it possible that it could be straightened by just loosening all the rear suspension attachment points up and aligning it before re-tightening everything?

Thanks in advance,


Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 02-24-2004, 09:53 AM
novajohnb's Avatar
It'll go, or it'll blow...
Last photo:
Join Date: Sep 2002
Location: new jersey
Posts: 152
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
You could probably make up >1 degree of difference by loosening the leaf spring U-bolts (or J-bolts, or T-bolts depending on spring perches) and moving the spring perches ever so slightly, then re-tighten.

By the way, is the 0.9 degrees relative to the frame or relative to the front wheels?

How does the car drive? Dose it track crooked?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-24-2004, 10:02 AM
Last photo:
Join Date: May 2003
Location: Baton Rouge, LA
Posts: 42
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts

I'm not sure about your first question. The measurement I gave was figured on a 4 wheel alignment machine with sensors on all four wheels. So, I'll assume that the measurement is relative to the front wheels.

I also added bolt-in subframe connectors and new body mount bushings on the sfront subframe since the last alignment so its possible that everything just needs to be loosened, aligned, then re-tightened.

As far as how the car drives: It tracks straight on smooth pavement. But rutted two lane roads tend to make the car wander quite a bit. I figured that was just a design shoprtcoming in the first gen Camaro front suspension more than anything else, as everything on my car is stock except for 1 1/8" swaybar up front.

Everything under the car suspension wise has been replaced within the last 15k miles. -- ie nothing is worn out.

I've driven behind the car and never noticed any crabbing (visibly at least)..

If the unibody were slightly tweaked, could it be straightened reliably?


Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 02-24-2004, 10:36 AM
aka Duke of URL
Last wiki edit: Finding vacuum leaks Last photo:
Join Date: Oct 2001
Location: Rockville, MD
Posts: 4,821
Wiki Edits: 1

Thanks: 0
Thanked 0 Times in 0 Posts

What the alignment shop performed is referred to as a Thrust Angle Alignment whereby the rear wheels are verified as being perpendicular to the centerline on the car (this can also identify bent axle housings). The front wheels are then squared off this value (rear wheels) before being aligned. Once they saw that the rear wheels were out of line, they should have backed it off the machine and advised you the actual alignment was just a waste of time (only charged hook-up time).

At this point, you might want to contact a quality frame/body shop that has a infra-red or SHARK alignment system to find exactly where the bend is. It may be as simple as have putting the rear aginst the spring pads incorrectly (which can be verified quickly with a tram or tape coming off a center point on the front of the car measure to the spring pads).

If the car does need to be pulled, I imaging the connectors will have to be broken lose and reattached after squaring.

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

All times are GMT -6. The time now is 10:50 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 1999 - 2012. All Rights Reserved.