Inaccurate speedo - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 06-22-2013, 07:58 AM   #1
Jeeper
 
tupper's Avatar
 
Join Date: Feb 2013
Posts: 63
Inaccurate speedo

Quick question, I bought my jeep seems to have had bigger rims and tires than stock put on, however, it seems to have thrown off he accuracy of my speedo by abt 5 mph. What's the best / easiest way to correct it?

tupper is offline   Quote Quick Reply
Old 06-22-2013, 08:00 AM   #2
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 33,742
AEV Procal $150

__________________
2007 Rubicon/Rock Krawler TR 2.5 coils/rear TB/Rancho 9000 31/32XL shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS/Artec front armor w/ Currie upper bushings=Frankinjeep from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is online now   Quote Quick Reply
Old 06-22-2013, 08:19 AM   #3
Jeeper
 
tupper's Avatar
 
Join Date: Feb 2013
Posts: 63
Thank you.... I know it's only 5mph off but....some times I forget myself!
tupper is offline   Quote Quick Reply
Old 06-22-2013, 09:44 AM   #4
Jeeper
 
ahsumtoy's Avatar
 
Join Date: Apr 2013
Location: Northern Arizona
Posts: 538
What my Jeep Dealer said

Quote:
Originally Posted by kjeeper10 View Post
AEV Procal $150
I have 33's and when I asked my friend who runs the maintenance section for the Jeep dealership, he said Jeep can only calibrate up to 285's due to government regulations. Therefore, I went out and got the AEV Procal. Great investment. By the way, I have had my Jeep in for maintenance, and no one has said anything about the Jeeps computer being changed.
ahsumtoy is offline   Quote Quick Reply
Old 06-22-2013, 09:55 AM   #5
Jeeper
 
VaderJK12's Avatar
 
Join Date: Mar 2012
Location: South Jersey
Posts: 704
Quote:
Originally Posted by kjeeper10 View Post
AEV Procal $150
X2

Inaccurate speedometer means inaccurate odometer.
__________________
'12 Black Unlimited Sport-S 6-Speed Manual (My Weekend Fun)
'10 Black Audi A4 Quattro (Wife)
'01 Silver Honda Civic (DD)
VaderJK12 is offline   Quote Quick Reply
Old 06-22-2013, 11:18 AM   #6
Jeeper
 
myrtlebeachjeep's Avatar
 
Join Date: Jan 2012
Location: myrtle beach,sc
Posts: 271
Dealership flashed mine after they installed bigger tires. I have checked it with two different gps's and it is accurate
__________________
2014 Rubi X
myrtlebeachjeep is offline   Quote Quick Reply
Old 06-22-2013, 12:29 PM   #7
Jeeper
 
RoadiJeff's Avatar
 
Join Date: Dec 2012
Location: St. Louis, MO
Posts: 2,046
Quote:
Originally Posted by VaderJK12 View Post
Inaccurate speedometer means inaccurate odometer.
I used to think this. However, I've read things over the years that say the speedo comes from the factory intentionally set to read slightly high for liability reasons, while the odometer is spot on. With the bigger tires he installed I guess both are no longer accurate but if he gets the speedo to read right then the odo will probably read slightly low.

I installed a speedometer calibration tool on my motorcycle where the speed was reading about 6.7% too high from the factory. That part is now accurate but the 25 mile ride to work shows slightly less now. I intend to get on the highway someday, zero out the trip meter next to a mile marker, ride exactly 30, 40, 50 or whatever miles, according to the mile markers and see how the two compare. So much to do and so little time, just haven't done it yet.
RoadiJeff is offline   Quote Quick Reply
Old 06-23-2013, 06:42 PM   #8
Jeeper
 
tupper's Avatar
 
Join Date: Feb 2013
Posts: 63
Thanks everyone, I'll be buying the AEV Procal soon! thanks again

tupper is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user 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.



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 Off
Pingbacks are Off
Refbacks are Off



» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 07:31 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC