I am in desperate need of some input. I have an 85 K5 Blazer six inch suspension lift three inch body lift 40" TSL 350 motor with truck avenger carb and a th700R4 transmission. Now for the problem the truck has been sitting about a year and a half at my parents barn and has not been moved in a year and a half. Before I parked it a year and a half ago it ran great no engine trouble and no transmission trouble at all whatsoever it all ran smooth. Well I finally rebuild the carb after all that time sitting and change the oil and filter and put new air cleaner on it and start it up it runs great. I go to put it into drive and I hit the gas and it stalls like I have my foot on the break. Start it back up and rev a bit then try again it moves but its like i'm trying to push a house with it. The engine revs high and it moves forward but only if I'm really giving it some gas i let off the gas and it seems to want to stall but only when its in gear. So I try reverse seems to reverse ok but I can still tell something is not right it takes too much engine power to move it. I put it in 4 wheel drive and now it moves a little easier but still feel that over exertion in the motor and feels like i'm pushing a semi. I notice that the back right tire seems to be moving faster than the left sometimes and after driving it about 200 yards I noticed a smell that smelled like burning brakes. Question is do I need a new tranny or are my brakes bound up somehow over time? And yes I checked the emergency brake it was off.