Speedo Error Correction??? - Off-Road Forums & Discussion Groups
Ford 67-96 F-Series, 78-96 Bronco All discussions of 67-96 F-Series Trucks and 78-96 Broncos

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 12-29-2002, 04:22 AM
**DONOTDELETE**
Guest
 
Posts: n/a
Speedo Error Correction???

Hey guys, I got the speedometer cable fixed and working, but apparently the coupler cable that had snapped was aftermarket with some kind of reduction for the correct speed with 33's. Now that it's back to stock my speedo reads about 8-12 mph faster than I'm going. How can I correct this? I know you can change the gear on the speed sensor, but without being able to set the gear mesh to allow for a bigger gear, the choices of gear teeth # seems limited if not fixed. Any thoughts??? Right now the gear is a 17T and I think either a 19T or a 20T would get it back pretty close. Thanks!
~Mike
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 12-29-2002, 02:43 PM
Mud in my Veins
 
Steve83's Avatar
 
Join Date: Dec 2000
Location: Memphis, TN
Posts: 5,301
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Speedo Error Correction???

Don't worry about setting the mesh on those little plastic gears! [img]images/graemlins/wink.gif[/img] [img]images/graemlins/grin.gif[/img] Ford designed them to work together in any combination so the factory guys wouldn't have to worry about it, either. [img]images/graemlins/smile.gif[/img] Just calculate your correction and stick the closest ratio gear in.

Yeah, just stick it in! [img]images/graemlins/smirk.gif[/img]
Steve83 is offline  
post #3 of (permalink) Old 12-29-2002, 04:00 PM
 
Join Date: Jul 2002
Posts: 908
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Speedo Error Correction???

When I called about the gear teeth the ford parts prople said for every tooth equaled 3 mph [img]images/graemlins/givemebeer.gif[/img]
80BRONCO is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 12-31-2002, 08:09 AM
Mud in my Veins
 
Steve83's Avatar
 
Join Date: Dec 2000
Location: Memphis, TN
Posts: 5,301
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Speedo Error Correction???

You can't accurately express a speedo correction in mph, because at 0mph, it doesn't change it at all. You have to say 3mph change AT a given speed, like maybe 60mph. But then you're saying xmph/ymph, which is just a ratio (x/y), which is how it actually affects the speedo reading. It's a percentage change or just a pure ratio. And an increase of 1 tooth over 18teeth isn't the same change as 1 tooth more than 19t or 20t, so even if it was exactly [email protected], it wouldn't be exactly the same change for every size gear.

I'm being really technical, but when you're setting your speedo, there's no point if you're not gonna be precise.
Steve83 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups 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 email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome