IF YOU ONLY DROVE IT A SHORT DISTANCE THE LIKELY HOOD OF DOING ANY DAMAGE IS PRETTY REMOTE BUT YOU SHOULD GET IT OUT OF THERE AS SOON AS POSSABLE ,, GET THE TRUCK UP ON JACK STANDS AND DRAIN THE TRANS AND THE TRANSFERCASE AS COMPLETELY AS YOU CAN , LET IT DRIP FOR AN HOUR OR SO, THEN REFILL THE TRANS AND THE T/C WITH KEROSENE AND START THE ENG AND LET IT IDOL IN NEUTRAL FOR ABOUT 30 MINUTES OR SO , AND IT WILL DILUTE THE REMAINING HEAVY OIL , DO NOT USE GASOLINE OR ANYTHING VOLITILE , NOW DRAIN THEM BOTH AGAIN AND REFILL , WITH 5W30 OR 10 W 30 AND YOU SHOULD BE OK, IF THE KEROSENE COMES OUT HEAVY COLORED YOU MIGHT WANT TO RINSE IT OUT AGAIN AND THEN LET IT DRIP DRY FOR A WHILE .THE KEROSENE WILL LUBRICATE THE BEARINGS ENOUGH THAT THEY WILL NOT BE DAMAGED AND ALL SO WILL NOT DAMAGE THE SEALS , JERRY