Speedo Calibration
 

Ok guys, I really need to have my speedo calibrated. When i'm runnin at 75mph it only reads 65mph. Anybody know where I can go to have it calibrated or have a tuner that can do calibration that i may be able to use during kicker bash? Appriciate any help!

This might help not sure though because of your big tires. Tuner might be a better bet but you can try it if you want.
http://faq.dakota-truck.net/Electron...struments.html

It'll take some time and patience since you have to pull the needle and put it back until it lines up.

I did it, so if you got a question, ask away

The needle has to be pulled? Do I just pull the needle and adjust it based on the gauge troubleshooting stage and restart the test?

Well dang, Idk if i'm not doing it right or if it won't work with my truck but i can't get it to work :/

Yeah you just pull the needle off and put it back in a different spot, then restart the test. Once it goes to those 3 preset positions then your good. If its still off while going down the road then you probably need to use a tuner. I actually am about to get one so when we go to Kicker Bash, I'll let you borrow it and fix it.

Sweet man, I can deal with it for now! I appreciate it!

No problem, just wish I would've thought of that earlier lol

Mine needs to be calibrated too. It's accurate up to about 15 mph. Lol

The speedo is setup by the VSS sensor on a a '99 and is adjustable through the BCM (body control module) which can be done by anyone like a dealer or a tuner like Superchips. SCT's cannot do this.
I'm not sure how removing the needle and moving it around would work but it sounds like you would damage the interior workings. It would certainly be off at other speeds because the mph is measured in either current or voltage.

I could be wrong, but generally tuners are VIN locked to the truck they're used on, so you can't use them to set different trucks, except as code reader.

EDIT: It should be noted that the test link above is for diagnostics testing of the guages for proper reading. It's not for bending or removing speedometer needles. The three positions listed are for voltage checks from the BCM as reference points.

Well found out that if we used my tuner, it wouldnt stay calibrated since it only does it and keeps it there with a tune. So that wouldnt work since you couldnt keep the tune... Best bet would be to pick up one of your own