1995 dodge Dakota 4x4 manual
So when driving and a/c is on it started blowing threw the defrost vents above dash while driving then let off the gas a little then it blows through the front vents? It just started doing this? A/C is cold and blows hard?

 

There is a vacuum check valve that holds vacuum for the vent doors that probably needs replacing.

 

Ok where is that check valve located? Thanks!

 

On the vacuum lines. Check the sticker under the hood.