just finishing swapping a 01 5.3/4l60e into my 91 gmc 1/2 ton

being a 91 the truck has its drac/vssb built into the cluster (not in a seperate white box)

meaning that the cluster expects to see the ac waveform from the 40 tooth reluctor wheel in the tranfercase

the problem is that the 411 pcm also expects an ac waveform from the 40 tooth reluctor wheel

connecting both to the same vss sensor results in neither receiving the signal


is there a solution to my problem (besides swapping speedometers I consider that a last resort)