You either have a blown fuse (same fuse as brake light), a malfunctioning brake light switch , (under dash on peddle) or a malfunctioning shift release solenoid . Check for brake lights, if they are not working it is most likely the fuse.
Solenoid in trans
2004 dose a dodge hemi pu 5.7L have a torch converter
Replace your transmission pump or get a new transmission.
The O/D OFF warning light in the bottom left of your tachometer on your 1999 Mercury Sable means that the ( OVERDRIVE IS OFF ) * that's the " top gear " of your automatic transmission
Sounds like you have a bad Vehicle Speed Sensor.
When the transaxle light is blinking on a 2001 Mercury Sable, it means there are some transmission issues that need to be addressed immediately. This condition may lead to locking of the transmission on second gear.
The one on the tachometer that is surrounded by a gear is the check transaxle warning light
Linkage is broken or loose - or trans pump shaft is broken ( big job)
On a 2001 Mercury Sable : That's your " CHECK TRANSAXLE " ( transmission ) warning light The warning light is located in the bottom of the tachometer on the left side . If the light stays on take the vehicle in for servicing
Pump the brake rapidly with them half engaged and attempt to shift it out.It should come into gear.
it is to select "overdrive" gear in transmission. mainly for highway driving. if you have both "D" and "D" with circle around it, use "D" for most driving needs.
If the light is on ( not flashing ) that means that the overdrive has been switched off ( the 4th gear of your automatic transmission )