speedo not work and OD light flashes

[BIG JOE]

mean if OD actually works? cuz it worked on the highway when i hit it button it downshifter out of OD

When the VSS starts to go TU.... THIS works, but THAT don't. Then sometimes THAT works but THIS Don't. JMO but if you've got 75K, or more... when OD or ABS lights start to Flicker/Flash/Stay on, Speedo bounces, CC can't maintain speed..... A good, cheap place to start "Chase'n the Gremlin" is: Replace the VSS.