Speedometer Calibration for larger diameter tires - Page 2 - Jeep Garage - Jeep Forum

Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK2 - > Suspension/Driveline/Brakes/Wheels/Tires

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #13  
Old 10-31-2015, 05:36 AM
Member
 
Join Date: Oct 2015
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 534
tuxarg is on a distinguished road
Re: Speedometer Calibration for larger diameter tires

Is anyone familiar with the rugged rigdge drive gear solution to fix the speedo problem.... does anyone knows what ratio (how many teeth) is needed for a 2014 GC overland 8 speed transmition and 275/55/20 tires


Sent from my iPad using JeepGarage

Reply With Quote
Sponsored Links
Advertisement
 
  #14  
Old 10-31-2015, 09:24 PM
Member
 
Join Date: Mar 2015
Posts: 573
Thanks: 56
Thanked 111 Times in 73 Posts
Rep Power: 1428
farfromovin has a reputation beyond reputefarfromovin has a reputation beyond reputefarfromovin has a reputation beyond reputefarfromovin has a reputation beyond reputefarfromovin has a reputation beyond reputefarfromovin has a reputation beyond repute
Re: Speedometer Calibration for larger diameter tires

Quote:
Originally Posted by tuxarg View Post
Is anyone familiar with the rugged rigdge drive gear solution to fix the speedo problem.... does anyone knows what ratio (how many teeth) is needed for a 2014 GC overland 8 speed transmition and 275/55/20 tires


Sent from my iPad using JeepGarage
You know, back in the day the speedo drive gear was always the go to fix for gearing or tire size swaps. I don't even know if our transmissions use a old school gear? From my limited memory, the gear was for speedometer cables that were attached to the gauges. I'm sure all this is transmitted via can bus now, but maybe there is still some gear in the tyranny that uses a magnetic pickup and sensor to generate that speed signal?

This would be a great way to get our speedometer and odometer calibrated with 32" tires if true.
__________________
'15 GC 4x4 Summit - GDE Hot Tune, Berger N54 ccv catch can, 4300k Philips HID fogs, VLED TRITON V3 LED brake lights
Reply With Quote
  #15  
Old 11-02-2015, 08:12 AM
midsouthduckhunter's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2015
Posts: 210
Thanks: 23
Thanked 32 Times in 28 Posts
Rep Power: 814
midsouthduckhunter is on a distinguished road
Garage
Re: Speedometer Calibration for larger diameter tires

Quote:
Originally Posted by farfromovin View Post
Thanks for the link. I emailed Edge asking the for a solution to fix WK2 ecodiesel speedometer with oversize tires and here was their response:

Phillip,

At this time we do not offer any products for that application.


Thanks,


Edge Products Technical Support
1080 S. Depot Drive
Ogden, UT 84404
I ended up calling Edge and their programmer is only for the Ram. That is way odd having something for the Ram but not Cherokee, but Edge said the software for speedo control is not in FI ECM but body control ECM. JGC body control quite a bit different than Ram truck.
__________________
Every day brings a new battle with technology.
Reply With Quote
  #16  
Old 11-02-2015, 08:22 AM
midsouthduckhunter's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2015
Posts: 210
Thanks: 23
Thanked 32 Times in 28 Posts
Rep Power: 814
midsouthduckhunter is on a distinguished road
Garage
Re: Speedometer Calibration for larger diameter tires

Quote:
Originally Posted by farfromovin View Post
You know, back in the day the speedo drive gear was always the go to fix for gearing or tire size swaps. I don't even know if our transmissions use a old school gear? From my limited memory, the gear was for speedometer cables that were attached to the gauges. I'm sure all this is transmitted via can bus now, but maybe there is still some gear in the tyranny that uses a magnetic pickup and sensor to generate that speed signal?

This would be a great way to get our speedometer and odometer calibrated with 32" tires if true.
Guys, speedo is an electrical sensor so no gear change possible. It would be possible for an electronic device to be installed between the sensor and body control ecm to adjust the speed.
__________________
Every day brings a new battle with technology.
Reply With Quote
The Following User Says Thank You to midsouthduckhunter For This Useful Post:
  #17  
Old 11-13-2015, 01:57 PM
New Member
My Jeep: 2013 5.7L
 
Join Date: Nov 2012
Location: Denver, CO
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 0
Colorado Kid is on a distinguished road
Re: Speedometer Calibration for larger diameter tires

Thanks all for your response and help. The additonal dialog is great as it gave me a couple of other ideas. I have a predator I use for my truck...i'll restore my truck (which will reset my predator) and then see if I set the tire size for my GC. That may be the best option for me to go.
Reply With Quote
  #18  
Old 11-14-2015, 01:32 AM
Member
 
Join Date: Mar 2015
Posts: 573
Thanks: 56
Thanked 111 Times in 73 Posts
Rep Power: 1428
farfromovin has a reputation beyond reputefarfromovin has a reputation beyond reputefarfromovin has a reputation beyond reputefarfromovin has a reputation beyond reputefarfromovin has a reputation beyond reputefarfromovin has a reputation beyond repute
Re: Speedometer Calibration for larger diameter tires

I am not familiar with the Predator, but I'm fairly certain nothing exists on market today that can fix our speedos. Kinda sad IMO.
__________________
'15 GC 4x4 Summit - GDE Hot Tune, Berger N54 ccv catch can, 4300k Philips HID fogs, VLED TRITON V3 LED brake lights
Reply With Quote
  #19  
Old 11-14-2015, 08:47 AM
N8BALL's Avatar
Member
 
Join Date: Jul 2015
Posts: 59
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 673
N8BALL is on a distinguished road
Re: Speedometer Calibration for larger diameter tires

Wrong...this can and will fix your speedos along with many other beneficial tweaks. It's already done wonders for mine!
ImageUploadedByJeepGarage1447512404.541169.jpg


Sent from my iPhone using JeepGarage
Reply With Quote
  #20  
Old 11-14-2015, 08:53 AM
Jim_in_PA's Avatar
Super Moderator

My Jeep: 2012 5.7L WK2
 
Join Date: Jul 2012
Location: SE PA (central Bucks County)
Posts: 4,669
Thanks: 856
Thanked 678 Times in 542 Posts
Rep Power: 96544
Jim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond reputeJim_in_PA has a reputation beyond repute
Garage
Re: Speedometer Calibration for larger diameter tires

N8BALL, that's a great solution, but for the "average Joe" who only wants to adjust speedo/odo for tire size...$500 is a big nut to pay!!
__________________
2012 GC Overland Summit - Winter Chill with New Saddle interior. 5.7L HEMI V8 - Pirelli Scorpion Verde Plus "shoes" - LED fogs and DRLs



Day-job...Telecom Technical Sales
Avocations...Woodworking, Equestrian, Food, Photography
Reply With Quote
  #21  
Old 11-14-2015, 09:05 AM
N8BALL's Avatar
Member
 
Join Date: Jul 2015
Posts: 59
Thanks: 0
Thanked 2 Times in 2 Posts
Rep Power: 673
N8BALL is on a distinguished road
Re: Speedometer Calibration for larger diameter tires

I consider myself an average joe all the way. But when we love our rides the way we do, we find ways to get the extras. It's all relative to how badly we want them. If you can find a used tuner for cheap you can spend $130 and get a new code to unlock it for use on your vehicle.


Sent from my iPhone using JeepGarage
Reply With Quote
  #22  
Old 11-16-2015, 09:17 AM
midsouthduckhunter's Avatar
Member
My Jeep: 2014 3.0L WK2
 
Join Date: Aug 2015
Posts: 210
Thanks: 23
Thanked 32 Times in 28 Posts
Rep Power: 814
midsouthduckhunter is on a distinguished road
Garage
Re: Speedometer Calibration for larger diameter tires

Quote:
Originally Posted by Jim_in_PA View Post
N8BALL, that's a great solution, but for the "average Joe" who only wants to adjust speedo/odo for tire size...$500 is a big nut to pay!!
Check ur area for an SCT tuner dealer. You can prolly negotiate with them to install a speedo recal tune for $100 or less. You wouldn't get any hardware, but your speedo would be corrected.
__________________
Every day brings a new battle with technology.
Reply With Quote
  #23  
Old 11-19-2015, 04:32 AM
Member
My Jeep: 2015 5.7L WK2
 
Join Date: Dec 2009
Location: Chicago area
Posts: 373
Thanks: 155
Thanked 29 Times in 24 Posts
Rep Power: 8391
LJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond reputeLJS8510 has a reputation beyond repute
Re: Speedometer Calibration for larger diameter tires

Quote:
Originally Posted by midsouthduckhunter View Post
Check ur area for an SCT tuner dealer. You can prolly negotiate with them to install a speedo recal tune for $100 or less. You wouldn't get any hardware, but your speedo would be corrected.
Has anyone done this?
__________________
01-i6, 03-v8, 08-CRD, 2015-v8 Overland ORII, Duratracs 275/65/18
Reply With Quote
  #24  
Old 11-19-2015, 03:05 PM
Member
 
Join Date: Apr 2013
Posts: 177
Thanks: 12
Thanked 48 Times in 36 Posts
Rep Power: 1628
indydof is on a distinguished road
Re: Speedometer Calibration for larger diameter tires

I am running 32inch tyres and speedo is perfect now, exactly the same as gps
Reply With Quote
The Following User Says Thank You to indydof For This Useful Post:
Reply

Tags
tires

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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
Speedometer calibration zrlee Suspension/Driveline/Brakes/Wheels/Tires 6 08-14-2015 06:50 PM
Speedometer Calibration marius8998 Suspension/Driveline/Brakes/Wheels/Tires 3 05-22-2015 12:17 AM
Speedometer calibration Hunterbo Wheels and Tires 1 09-23-2014 03:06 PM
Speedometer Calibration with 3.0 CRD vbjornsson Diesel Powered WK Grand Cherokee 5 01-17-2014 03:50 PM
speedometer accuracy / calibration? ChuckinMA Audio/Visual/Navigation 6 09-27-2012 04:10 AM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 04:06 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community

JeepGarage.org is in no way associated with or endorsed by FCA US LLC. Chrysler, Dodge, Jeep, Ram, Mopar and SRT are registered trademarks of FCA US LLC.