So I got to go on test drive today. 32F/0C. Air velocity from the heater is not much better even after I replaced the short hose but it was a sunny day so I stayed comfortable. The engine ran fine, still idles lower than what it had been AND without stalling so I am pleased about that. My main concern is my freewheel device. It won't engage at times. It's like there is no 4th gear there when I let out on the clutch. In order to get it to "catch", while in fourth, I need to push in the clutch and let the RPMs fall down then let out on the clutch and then it catches. If I coast for awhile, it does the same thing again! But once it is engaged and I keep accelerating, it doesn't slip or anything. This same thing occured back in August. At the time I was running 30 weight engine oil. Keri said she ran Detron II ATF in heres and after 20K miles has not shown any ill effects. So I tried it. It instantly fixed the problem. So I figured the thicker transmission oil was causing it to stick. But now the problem is back. It could be the colder temperatures but since this happned back in August, I'm not quite sure if the gearbox fluid has anything to do with it. The only thing in common is when this first occured back in August, the car had not been driven for awhile. Maybe 2 or 3 weeks due to "needing repair" due to something. So I had issues with my brakes about 6 weeks ago. Then my float valve trouble then ignition issues so the car has not been driven regularly for over a month. Any correlation to sticking freewheel device and not being driven regularly? When this occured back in August, even after driving 10 miles it would still slip at times. Only after I replaced the gearbox oil with Dextron III did it fix the problem. Could there be gunk building up on it from sitting? Where is it located in the transmission? Is it submerged in oil or above the oil line? What could be causing this? Not enough lubrication from sitting because it's above the oil line or gunk building up on it from sitting in oil for an extended period of time? Is it about to "go" and I need to tear into the transmission and replace it? Do you have to tear the whole transmission apart to replace it? I need to go to a meeting tommorrow morning at work (supposed to be below freezing tommorrow morning) so I may drive it, if I dare and see what happens.