Corvette gear ratio ? How to determine ratio? - 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 06-01-2013, 09:39 AM
Registered User
 
Join Date: Jan 2011
Location: az
Posts: 108
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Corvette gear ratio ? How to determine ratio?

How do I find out what gears are in my rear end??? Does IRS change the method. I measure at the drive line and I get 1.75 turn of the drive line to one turn of the wheel. When I measure at the half shaft I get 1 to 1. It's a 1973 Vette.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-01-2013, 10:06 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,713
Wiki Edits: 0

Thanks: 309
Thanked 743 Times in 714 Posts
all Corvettes are posi,so jack up the car and turn the drive shaft until the tires turn one revolution.

or do the same thing until the tires turn 10x and divide by 10 for a more accurate indicator
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-01-2013, 10:47 AM
Northstar T's Avatar
62 Vette L-98 TPI & ZF 6 speed
 
Last photo:
Join Date: Jan 2011
Location: S. W. Oregon
Posts: 233
Wiki Edits: 0

Thanks: 11
Thanked 37 Times in 30 Posts
If the factory gears have not been changed, there is a code stamped on the bottom flange of the diff case. for 73 they would be:
Code Ratio
AA 3.55
AB 3.70
AC 4.11
AW 3.08
AX 3.36
LR 3.36

Russ
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-03-2013, 06:10 AM
artsvettes's Avatar
Registered User
 
Last photo:
Join Date: Aug 2006
Location: New Jersey
Posts: 164
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by vinniekq2 View Post
all Corvettes are posi,so jack up the car and turn the drive shaft until the tires turn one revolution.

or do the same thing until the tires turn 10x and divide by 10 for a more accurate indicator
All corvette rears were not posi
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-03-2013, 06:43 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 7,713
Wiki Edits: 0

Thanks: 309
Thanked 743 Times in 714 Posts
independent or solid axle?

Quote:
Originally Posted by artsvettes View Post
All corvette rears were not posi
Pre 62 vettes? I have never seen a 63 vette or newer(dana) that was not posi,thanks for the info.
having non posi in a sports car is kind of strange,especially the companies flagship
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-03-2013, 06:46 AM
Registered User
 
Last wiki edit: General Motors transmissions Last photo:
Join Date: Mar 2006
Location: near Yellowstone park
Posts: 4,263
Wiki Edits: 27

Thanks: 11
Thanked 247 Times in 232 Posts
gear ratio check

for any car count the turns of the drive shaft for BOTH wheels to turn ONE time, or for One wheel to turn TWO times. The older a car is the more chances that the gears have been changed .
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
Richmond Gear 5-speed,Why all the first gear ratio options? Argess Transmission - Rearend 1 10-17-2011 07:11 AM
Trying to determine rear ratio yragat Transmission - Rearend 4 09-15-2010 04:00 PM
how to determine the right ratio Ratoflic Transmission - Rearend 4 07-07-2007 04:04 PM
Rear End Ratio Why 3.42 in the corvette x711 Transmission - Rearend 7 01-01-2007 09:20 PM
How to determine gear ratio in Ford 9" Kaylah Hotrodding Basics 7 10-21-2003 08:18 PM


All times are GMT -6. The time now is 06:29 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.