Any ideas on this?.... - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ 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 12-04-2010, 07:05 PM   #1
Jeeper
 
betdee's Avatar
 
Join Date: Feb 2010
Location: TN
Posts: 49
Any ideas on this?....

Hi all. I just brought home a 1997 Jeep Wrangler and noticed that my mph was 6 miles slower than it should be. The speedo said 50 and my gps said I was traveling 43-44 mph. The tires are the same size listed on the manufacturer sticker inside the door, so I know it's not that. It seems stock all around and has 103,000 miles on it.
Any ideas?

betdee is offline   Quote Quick Reply
Old 12-04-2010, 07:07 PM   #2
Jeeper
 
jasonwrangler's Avatar
 
Join Date: Oct 2010
Location: Omaha, NE
Posts: 892
could be that the previous owner had bigger tires on it and changed speedometer gear but put stock tires on it and sold it forgot to switch back the speedometer gear.

jasonwrangler is offline   Quote Quick Reply
Old 12-04-2010, 07:08 PM   #3
Jeeper
 
InfernoGirl's Avatar
 
Join Date: May 2009
Location: Newburgh IN
Posts: 11,419
Sounds like someone had bigger tires and changed the speedo gear. You can either change the gear back or put on bigger tires to fix it...
__________________

Dirty Mudder column covers|

'01 Wrangler Sport, Sienna Pearl Mine
'07 Rubicon 2D, Flame Red His
'11 Wrangler Sport 4D, Black Ours...

Quote:
Originally Posted by Kate View Post
Not every girl, is a Jeep girl. We're a special breed.
InfernoGirl is offline   Quote Quick Reply
Old 12-04-2010, 07:09 PM   #4
Jeeper
 
jasonwrangler's Avatar
 
Join Date: Oct 2010
Location: Omaha, NE
Posts: 892
Quote:
Originally Posted by InfernoGirl View Post
Sounds like someone had bigger tires and changed the speedo gear. You can either change the gear back or put on bigger tires to fix it...
bigger tires sounds good.
jasonwrangler is offline   Quote Quick Reply
Old 12-04-2010, 07:10 PM   #5
Brewing, Skiing & Jeeps..

WF Supporting Member
 
Bruck's Avatar
 
Join Date: Mar 2010
Location: Right next to the Kegerator...
Posts: 549
I suggest bigger tires.
__________________
04 Dodge Dakota
01 Pathfinder
03 Rubicon

Bruck is offline   Quote Quick Reply
Old 12-04-2010, 07:15 PM   #6
Jeeper
 
WahooWolfe's Avatar
 
Join Date: Sep 2010
Location: Sunny Central Florida
Posts: 225
Quote:
Originally Posted by Bruck View Post
I suggest bigger tires.
Ditto
__________________
The more I know, the less I understand.................

LIVE, LOVE, LAUGH, LEARN
WahooWolfe is offline   Quote Quick Reply
Old 12-04-2010, 08:10 PM   #7
Jeeper
 
YJjeep's Avatar
 
Join Date: Aug 2010
Location: Romney WV
Posts: 1,608
Images: 3
Everyone agrees, BIGGER TIRES! unl:
Problem solved bro.
__________________
No longer a jeeper, BUT I will return!
YJjeep is offline   Quote Quick Reply
Old 12-04-2010, 08:15 PM   #8
Jeeper
 
UnlimitedLJ04's Avatar
 
Join Date: Aug 2010
Posts: 7,325
pull the speedo gear out of the t-case and look at the number enscribed on it. thats the number of teeth. that corresponds to a specific gear ratio & tire size. look up speedo gear charts on google and see whats wrong. buy the proper speedo gear and its fixed.

http://www.4x4xplor.com/speedo.html
UnlimitedLJ04 is online now   Quote Quick Reply
Old 12-04-2010, 08:15 PM   #9
Jeeper
 
Bronson0331's Avatar
 
Join Date: Jul 2010
Location: it should be Fullerton,CA
Posts: 16
Images: 2
Question

but how would he determine how big the tires where before the change, if only the pervious owner cant be reached?

-----------------------------------------------------------------

get dirty, stay dirty
Bronson0331 is offline   Quote Quick Reply
Old 12-04-2010, 08:58 PM   #10
Jeeper
 
betdee's Avatar
 
Join Date: Feb 2010
Location: TN
Posts: 49
Thanks. I just checked the spare and it's a 30 inch so I think I'll get some 30's then. My last Jeep had 31's and they looked good too.
betdee is offline   Quote Quick Reply
Old 12-04-2010, 10:07 PM   #11
Jeeper
 
monkeee2002's Avatar
 
Join Date: May 2010
Location: Western Idaho
Posts: 1,468
Quote:
Originally Posted by Bronson0331 View Post
but how would he determine how big the tires where before the change, if only the pervious owner cant be reached?
There's a chart on the link that Unlimited posted, he can check his spedo gear and ring/pinion against that chart to see what tire size he's set up for.
__________________
" ... Nobody said it was a good plan. It's like somebody went through an actual strategy and replaced every instance of the word 'tactical' with 'balls out.' ... "

monkeee2002 is offline   Quote Quick Reply
Old 12-04-2010, 10:11 PM   #12
Member
 
Join Date: Aug 2010
Location: somewhere....
Posts: 11,188
Quote:
Originally Posted by Bruck View Post
I suggest bigger tires.

problem solved. get bigger tires.
redjeeper is offline   Quote Quick Reply
Old 12-04-2010, 10:53 PM   #13
Jeeper
 
UnlimitedLJ04's Avatar
 
Join Date: Aug 2010
Posts: 7,325
Quote:
Originally Posted by betdee View Post
Thanks. I just checked the spare and it's a 30 inch so I think I'll get some 30's then. My last Jeep had 31's and they looked good too.
so your solution to fixing the speedometer is to buy tires, a tire size of which you have no idea corresponds to the speedo gear or axle ratio, and costs several hundred dollars? spend $500 on tires, only to find out you could have fixed (and still need to fix) your inaccurate speedo with a $50 speed gear?

do you also buy a new house every time the toilet clogs up?

UnlimitedLJ04 is online now   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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Gerry Can Mount Ideas? adawg38 TJ General Discussion Forum 29 02-26-2012 01:17 PM
License plate ideas bigjay0512 JK General Discussion Forum 23 05-31-2010 10:54 PM
Custom Bumper Ideas GoldenEagle Builders Corner 8 03-19-2010 12:23 PM
open to any ideas.... yjkid95 YJ General Discussion Forum 2 03-14-2010 03:52 PM
Resources For Mod Ideas 1987 wrangler YJ General Discussion Forum 14 09-07-2007 07:53 AM



» Featured Product

All times are GMT -5. The time now is 10:47 AM.



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