I was just curious what you guys are doing to reprogram your speedometers for larger tires on the new 6.4L Diesel trucks? I haven't been able to find a device to do it it. I bought the superchips cortex and it "isn't available yet" meaning it probably never will be able to program. I also work at a Ford Dealership and my techs haven't been able to set the size either. Thanks in advance for your help.

 

TS Performance offeres a unit that taps into the wires coming off the diff...

 

Have you personally used this product?

 

Nope...but I am told it works, and its the only one that does. Its called ReSpeed

 

That is great! Thank you for the info.

 

I thought I had this all figured out and purchased the Pro Comp ACCU Pro Speedometer & Odometer Calibrator as per their website they advertise it's tire range from 24" - 44" plus the ability to adjust for gear ratio changes. I figured why spend roughly $300.00 for the other "inline type" where you have to splice wires etc. I thought it was all good until I hooked it up and it only gave me a tire range from 30"-35" Since I'm running 37's it was still about 3-4mph off AND there's no option to adjust for gear ratios. After leaving numerous messages for a non existent tech support I tried calling Hypermax (who actually makes it) they said "no it's only good up to 35" tires". Sounds like false advertising to me! I'll be taking this thing back.

Has anyone had any luck with the TS Performance Re-Speed or the Superlift Truspeed? Those are the only two I know of that run "in line" and are not a programmer type. -thanks

 

Another one to check out is the Speed Wizard...

Speed Wizard Speedometer Correction

If you want more information on the product or just general information on the subject contact Mercury45 aka Kenny. He is a member of this forum and the one who developed this product...

Ford Truck Enthusiasts Forums - View Profile: Mercury45

 

thanks for the mention....

yes folks, works on 2008 just fine

kenny