About 6000 on the rebuild and YES ITS STEEP.. the higher we went up the less air it would get. its really dumb how they set that mountain road up here, with the gearing this thing has 1 st was too low, 3rd was too high. The higher up we got the more it wanted to Bog down and we were Pulling a Heavy trailer with 2 snow Mobiles (2.6L) Loaded with Gear ect. Put it together, I was Milking it all I could to try and shift to 3rd to drop the RPM's but no go. No smoking, no Loss of oil Pressure, nothing went wrong, I still have NO problems at all, and I think it liked to Spin that fast. It sounded Like we were going 300 MPH really we were going 15 to 20 average....LOL. Small Engine+ Lots of Load= No Power going up Steep Grades.