Hello all, I have a cable driven transfer case that is using the Dakota Digital (DD) 8K pass thru VSS Generator. We have the shift/TCC speeds about right by updating the Speedo>> Calibration>> Hardware>> field but the ECU doesn't have speed displayed in Scanner? The ppm is getting into the ECU thru the original RED pin 20 low, 21 VSS wiring. I found it odd the signal is good enough to get the tranny to shift but not for speed to display. Has any one had the same issue and offer a solution? The shift points are real close to my tables but again I need to log speed in scanner.
Thanks for any help.

1989 K1500 truck
5.3L LS fresh build
Long tubes
Texas Speed Stage 3 High Lift 216/220, .600"/.600"
Trunion upgrade + single beehives for high lift
DBC TB stock 78mm
4.56 gears with 4l60E
35" tires
DD VHX gauge kit