You don't. The pulley is pretensioned by the manufacturer. If the belt tension is incorrect, the pulley must be replaced.
You don't. If it has stretched too much for the tensioner pulley to handle, you need a new belt. Or, if the tensioner pulley is not applying correct tension, the tensioner pulley must be replaced.
You don't. The serpentine belt tension is automatically maintained by the tensioner pulley, which is an idler pulley located on the passenger side of the system and looks like it doesn't drive anything. If the belt tension is incorrect, the tensioner pulley must be replaced. If the question meant 'how to release tension from the belt' (for removal, etc.), this is done by applying the correct size socket wrench to the tensioner pulley's center nut and rocking the pulley away from the belt.
The 1998 Dodge Dakota tensioner pulley will be the top pulley on the left-hand side of the engine. The tensioner pulley will be able to slide back and forth.
The tension pulley should have a bolt that holds it on, allowing you to replace the unit.
There is a Tensioner Pulley that you have adjust in order to tighten the belt. There is another hex bolt that can be screwed in or out depending on how you want to tighten or losen the belts. Adjust it until prefered tension is reached.
The automatic transmission in a 2003 Dodge Dakota does not have bands.
It is not adjustable.
they are self adjusting
Done automatically by belt tensioner
with a socket wrench or Phillips screwdriver
you dont, it has a spring loaded tensioner
You don't. It employs a spring loaded automatic belt tensioner pulley located usually on the passenger side of the engine. If your serpentine belt is too loose, either the tensioner pulley has failed (possible, but unlikely) or the belt has stretched beyond the limits of the tensioner pulley and needs to be replaced (more likely).