If you have gone up in tire size and are wanting to get your speedo right again, you might check this out

http://www.4wheelparts.com/product2....ss=SUP&cat=SUS

 

Take the bezel apart, move the needle, done. Cost 0

 

WHAT PART OF THE BEZEL AND WERE IS IT LOCATED? HOW MUCH DO YOU MOVE THE NEEDLE?

 

That's all fine and dandy, but to truly readjust your speedo, you need to get a different drive gear. Moving the needle will make it accurate at ONE speed, a different gear will make it accurate at all speeds, given that you get the correct drive gear. It's all about ratios. Somebody back me here, I could be speaking out of line....

 

He's right you could move the needle but tha's a harder job than installing a new speedo gear. Then of course we also have to consider what year of trucks we are talking about. If it's a 97 or maybe a 98 you can just buy the 12 VSS gear. Now if it's a newer one you have to have a delaer recalibrate the comuter system for you has it does not have a VSS gear. There is also a product out on the market that will do this for you as well but you are probably looking at 50 or dollars. But just moving the needle will only make it right at one speed because the faster you go the more it's off.

 

Yea, moving the needle does not solve the problem. Then if it's accurate at 20mph it will be a way's off again at 70mph. What I thought was cool about this thing is it's virtually nowork to recalibrate. But that it also recalibrates your shift points and such for those with auto's. I personally don't care that my speedo is a little off and wouldn't spend this kind of $$$ to fix that problem. But I have seen a lot of posts on here about it and just thought I would let those people know.

 

Moving the needle doesnt fix anything, on 98 and earlier trucks you need to change the gear. On late model trucks it is all computer. There is no gear, it is an inductive pickup that reports speed to the computer which then moves the needle and odo.