I have larget tires and wane my speedometer to be accurate, someone told me about a "SpeedCal" for mustangs.

So can I just use thins kind of thing on a Ranger? I mean, why not?

https://www.americanmuscle.com/ford-...tool-9410.html

 

Welcome to the forum

Ford Rangers used speedometer cables until 1995 and same speed gear setup until 1998, so those just need new gear installed to correct for tire size or axle ratio changes.

They switched to VSS(vehicle speed sensor) from 1998 to 2000, and then switched to OSS(output shaft speed) sensor in 2001 and up

That unit seems a little pricey for what it is
Check this one: Universal Speedometer Signal Interface

If the Mustang model is 'plug and play' then it may be worth the extra $60

But without your year I can't say.

All Ford electronic speedometers use 8,000PPM(pulse per mile) as correct calibration, so that is what you are "correcting"
A larger tire will only generate say 7,500PPM(less rotations per mile) so you need to increase the PPM so speedometer can reflect correct speed


Also check with dealer or local shops about speedometer calibration, if it's a 1998 or newer it may not cost as much as a add-on device to have software re-calibrated for tire size, 1998 and up all use software in GEM or Computer, or even 4 wheel ABS module, to calibrate for tire size and axle ratio, and it can be changed.
Unless you are going to change tire sizes alot the add-on device might not make "cents" as in dollars and cents, lol.

 

Mine is a 2002 2.3 Automatic 2 wheel drive.

 

2002 will use an OSS sensor on the transmission tail housing, computer does the calibration and since it is an automatic you may want to call dealer or local 4WD shops about software calibration.
4WD shops because 4WDs are more likely to get larger tires and need this type of service
Even some tire shops may offer this service or recommend someone

Computer needs to know actual speed for shifting gears, so add-on calibration should be at the OSS so computer gets corrected speed, but if you haven't noticed any odd shifting or bogging down then maybe only speedometer correction is needed.

The Mustang unit only covers VSS installation not OSS which uses a higher PPM input
So not so sure it would work
I would email them and ask, tell them year of Ranger and it is an automatic, also size of stock tires(look on the drivers door) and the size of new tires, this unit does have a limit.

 

I e-mailed them and seems to be a YES.

 

I use the Dakota Digital Calibrator and it works very well. I have two sets of wheels and tires for street and off-road. I have to recalibrate for each set because they are different diameters. It takes less than minutes to recalibrate. Initial installation takes considerably longer.

 

Where did you install yours? Under the dash?