speedometer gear ratio????

[Gengis]

Does anyone know the ratio of the speedo drive gears sitting near the rear output of the transfer case? I am talking specifically about the split transfer case that came standard with the H55F gearbox. I am fitting an electronic speedo and need this info to calculate the pulses per wheel turn.
Much appreciated. G

 

[beanz2]

As I understand it, the ratio varies with trim level/tire size and axle ratios. What do you have?

Dave