Any one know the electronic speedo pulses these generate? I need to get an electronic speedo and want to see if I will need the pulse generator or not.

 

You'll probably need a speedo buffer/calibration box. I'm using one made by Dakota Digital.

It's a matter of calculating how many pulses per mile, and you'll have to factor in tire circumference as well as gear ratio. FWIW I believe the reluctor in the 4L60e has 40 lugs.