"signal for the speedo comes off your transmission."
Not on a stock 2000, it doesn't.
VSS on the rear axle is the speed signal source, then it gets "conditioned" by the 4WABS module.
Jay, I can send you VSS/ABS Wiring Diagrams for a 2000, if you PM me an e-maill address that will receive .pdf attachments. I'll send you what I sent Tim, it's already handy.