Guys,
I have a '98 ranger 3.0 V6 with speedo issue. It works for a few minutes then dies after start up. I tried swapping the sensor in the rear dif. The problem got worse when i did that. The speedo didn't work but the OD light started blinking and the check engine light came on. It shifted at a higher RPM then before i swapped the sensor and MUCH harder shift. I pulled a code from the check engine and i got a 500 code i think. I swapped in the old sensor and got rid of the shift and high RPM issue. Still have a nonworking speedo though.
What else do i need to look at? I am stumped.

Thanks in advance for any help.
SOTA

 

Guys any ideas???