What gears do I have in my axles? - Page 3 - JeepForum.com
Search  
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > JK Wrangler Technical Forum > What gears do I have in my axles?

Currie Antirock, Currectlync & Lift Kits on Sale!Rough Country Lift Kits and Parts!Yukon Hardcore Locking hubs Dana 44!! CCOR 706-207-4140

Reply
Unread 06-18-2013, 06:39 AM   #31
Rtone1583
Registered User
2009 JK Wrangler 
 
Join Date: Oct 2012
Posts: 194
Quote:
Originally Posted by ronjenx View Post
Remember, you were describing how the computer determines what speed is to be displayed on the speedometer.

All the computer needs to know is distance per tire revolution ( for the miles part), and how long it takes to make one revolution (for the per hour part). It gets this data from the ABS tone rings.

If what you say is true, the mph would be wrong when coasting downhill with the engine at idle; when the automatic's torque converter is slipping; when either transmission is in a gear other than top gear, (if top gear is what is assumed); etc.

As mentioned in a previous post, people who change gear ratios and don't reprogram, don't see a different error in the speedometer.

A 30" tire travels about 7.85 feet per revolution.
That's about 672.6 revolutions per mile.
If the tire rotates at a rate of 672.6 times per minute, the speedometer will show 60 mph.
I don't see any gear ratio or engine rpm data in that.
Yep. You're right. I'm trying to incorrectly join what the computer does and the old fashioned method. My apologies.

Rtone1583 is offline   Reply With Quote Quick reply to this message
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user 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 e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
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.


Thread Tools






Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.