HI
HAVE A 96 ELDORADO TOURING, THE TRANS WILL NOT STAY IN OVERDRIVE.
IF I MANUALLY **** IT GOES INTO OD AND THEN BACK TO 3RD
IF I LET IT SHIFT ON ITS OWN. IT GOES TO OVERDRIVE AND THEN NOTHING
WHAT TO DO???
SPEED SENSOR??RELAY???
HELLLLPPPP
CHRIS

First off, welcome to the forum. See if you can retreive a transmission code with a code reader. There might be a solenoid that is bad. Also whats the condition/color of the fluid?