Our speedometer isn't fully calibrated, so the best I can give is 3000 ish miles, with the only casualty being one of the AC hard pipes (one of the reasons we went to Reno was to get that fixed).
We got between 18 and 19 MPG @ 85, with the odometer being off, that calculates out to near 21 MPG.
No carnage with the trans, we could haul a little bit of wood under the bed cover, if it was thin enough.
