I just bought a 85 Jimmy a few weeks ago. I have been reading on here for a few days. First off, this forum is great. More info here than any other single place I have found. Has anyone seen these problems? 1st. When I turn on the fan, with or without A/C, my voltmeter gauge has a severe drop. Down to 9 volts most of the time at idle. If I give it a little gas, it goes up some, but not much. The guy I bought it from said the thing will blow fuses on occasion when on "HI" He said he fixed it prior to me buying it. I have not blown any fuses, how ever I am concerned because it seems to drag down the electrical system so much. None of the other cars I have ever had did that. This is with or without headlights on, and no radio running. The A/C compressor being engaged or not does not seem to make a difference. Its just the fan itself that drags down the volts. I have also replaced the alt with a 94 amp one. Then a smaller pulley on the alt. I replaced the fan motor. (Bearing made to much noise, LOTS!) Anyone seen this, have any ideas? What should I look at next. (Also, the fan does stop and start sometimes. When that happens, I hear a click from the driver side kick panel area. Like I said, I did not replace any blown fuses yet. I have been wondering if the fix has been some type of auto resetting fuse just to keep it working. I looked in the right slot however, and the fuse matches the fuse box rating for that slot. This is my main problem right now. (Don't want to have a fire) I just had the local http://www.4wheelparts.com/ shop tell me I need to replace my u-joints and my rear( maybe front ) seal on my transfer case. Also, the rear wheels chirp sometimes, and I also hear/feel a good thumb/thud coming from the rear sometimes. Not sure what, if any changes were made to the rear end, after it left the factory. I have been told that it may be going bad, or just need some limited slip fluid. Or a rebuild of the clutch packs/gears for the limited slip mechanisms. On the Transfer case, how hard is it replace the front and rear seals? Rebuild it with new bearings, seals? Who carries parts for a transfer case? Called a couple places no luck so far. (NP 208 tag on it.) If I pull the plug to fill the transfer case with gear oil, do I fill it til it comes out the fill hole? What is the best type oil to use? I drive it daily and so far have done some offroading, although nothing to major. Would like to go to this place out past Burnet I have heard about, and been to once (hopefully can find), but want to make sure as best I can that what I bought is ready to do so mechanically. The nut on the top of the thermostat housing for the cooling system, anyone know what size? I have tried up to 1". Its bigger than that. I am wanting to replace the thermostat. Its the little plastic item with 4(?) hose nipples on the removable housing. Also, what do most of you have for normal gauge temps running down the highway? Mine is 210 to 230 so far. However, running slow, or on trails it runs a lot cooler. And lastly, I have an oil pump to replace the one in it with, the gauge bounces all over the place sometimes. Figured I would just replace the oil pump to be on the safe side. I looked under the engine, does not seem to be anything in the way to bad. Is there any hidden surprises? Any help suggestions will be greatly appreciated.