[img]i/expressions/face-icon-small-smile.gif[/img]1999 Explorer 400. Based on what I have been reading in the Forum, it appears it is time to replace the belt. Is the Gates belt (part number 19AT4090) from the NAPA store the correct one to use? Will it fit properly?

 

Yep that's the #.You may have to take a shim out of the secondary for the belt to ride at the right height.It should be at about 1/8 of an inch above the secondary looking at it from the side.