Hey guy, I'm with the bunch. Welcome to Blazerland. I know your pain, it sounds like you bought my truck. I got mine and no gauges work, the torque converter was going out, the drivers seat was broken, it has fulltime 4x4, 3.08 gears, and was painted flat black out of a rattlecan. But for $431, who can complain. Let me tell you what I did to it, which I wouldn't seriously recommend. I took the Beast Tuff Truck racing which was a big thing out in west Texas. Ran her 4 times, balls out and toasted the converter, also ran into Barbarian and smashed the frontend. Won all of about $150 but had a great time. Then I was left with a truck that needed even more work, but the K5 had gotten to me and I began thinkin daily driver. Bought 3/4 ton axles with 36" Swampers for $700, and ran out of money. And that's where she sits today.
Now what I should have done is this:
Rebuilt the tranny, got new torque converter
Installed P/T kit in transfer case, reinstall
fix the seat
get new gauges working
and drove the heck outta it.
I'm plagued with the standard, well I wanna change this, so I might as well do this and this and this so I won't have to pull it again. Rome wasn't built in a day! Don't fall into that, unless your money supply is bottomless, your truck will be sitting for months just like mine.
The guys are right though, you need to drain and refill everything. Who knows what the prev owner did? Watch for water in your oils, it might indicate bad gaskets and seals. Also watch for metal shavings, they can indicate what's wearing out. Flush your cooling system, oil your grease zerts if so equipped, and buy yourself a Chiltons Manual at your local parts store, you're gonna need it
.
Just my four cents.
Bryan
Durant, Ok
'79 Blazer in progress