| Re: VSS help
with the hi-res reluctor, the ECM is seeing a lot more than 4000 pulses per mile.
the hi-res reluctor produces 40 pulses per revolution of the drive shaft. with your gear, your around 150~160 pulses per revolution of the tires.
i have played with speedo pulse divisor, but i never had any luck with it. i used the VSS setting.
with a 2.42 gear & using Super_8dm xdf, i had my VSS set to 76800 pulses per mile.
i think you may have the same problem i had, it seems the 7730 ECM has problems with the hi-res speed sensor the pickups use at higher speeds. at around 60 MPH or so the speed reading in my ECM starts to drop.
if i remember right, around 70 actual MPH, my ECM shows around 50 MPH.
the faster i went above 60 MPH, the slower the ECM shows.
my work around to it is inputting the VSS signal to a DRAC & using one of the outputs of the DRAC to supply the signal to my speedometer, ECM, & cruise control.
the DRAC would need to be calibrated to your car, that means changing the jumper wires inside of it.
your running a 4L60E, what ECM are you controlling it with? you should be able to use the trans ECM to output a good signal to your speedo & engine ECM. | 
