94 Pontiac transport van The speedometer isn't working and it won't switch gear from first you installed a speed sensor this was the problem last time but it still not fixed any answers?

If the speedometer isn't working and the van won't shift out of first gear despite replacing the speed sensor, there could be several issues at play. Check the wiring and connectors associated with the speed sensor for damage or corrosion, as faulty connections can lead to improper readings. Additionally, the problem might be related to the vehicle's transmission control module (TCM) or a malfunctioning governor. If these components are functioning correctly, consider having the Transmission Fluid level checked and the system scanned for any diagnostic trouble codes (DTCs) that might provide more insight.