Transfer case sending unit.

[Injected1]

Trying to figure out how in the heck I am going to install my digital standalone speedometer. The speedometer only comes with 2 wires a positive and negative and it works by pulses per revolution (16). Does anyone know what the factory sending unit on the transfer case does as far as pulses per revolution? If it's not 16 what can I do to run this speedo? My truck is controlled by a FAST and I have no DRAC. Please help.

Thanks, nick

 

[Norm]

Re: Transfer case sending unit.

On my Auto meter speedo in my Biscayne, you have to hold the tripmeter for 2 miles and then release it. It goes by the pulse signal but remembers how many pulses it gets.I used the gps for the 2 miles, and then when I set the speedo it was less then 1/10 of a mph off,so was really close. What make of speedo are you using? They might have a tech line or e-mail them to help you out.