Griz, I'm having the exact same issue, Ive checked for crap that fell down the defrost vents and nothing, checked the linkages and they all appear and sound like their working,the fan sounds like its running hard but almost no air out the defrost. I'm going to try to get at the air-box tomorrow.Ill keep you updated. METALMOVER


1987 Raider,2.6,mt,78"Meyer snow plow,100lb. Doberman alarm,weber carb, lockouts from here- 1989 V-6,SWB, A.T. 4x4, 31'S