AFTER DRIVING I PUT THE TRUCK IN PARK, BUT SOMETIMES IT WILL STILL ROLL FORWARD OR BACKWARDS. IT DOESN'T DO IT ALL THE TIME, BUT ENOUGH TO IRRITATE ME. SOMETIMES I CAN PUT THE SHIFTER IN THE DRIVE POSITION AND THEN IN PARK AND IT DOESN'T ROLL. PLEASE HELP. NIKKI

 

Sounds like you shifter linkage is out of adjustment.
Mike

 

After you adjust the linkage.
You need to put the parking brake on so you don't brake the
parking pin in the transmission.
If you brake the parking pin you will have to rebuild the transmission.

 

thanks to both of you guys. I am going to get down and dirty tomorrow trying to fix this problem. You may here more from me tomorrow.
thanks
Nikki