Originally Posted by
bernside
spent 2 hrs at the bike shop test riding between changes. Frame is straight, derailleur is ok, changed out the chain rings and the cassette and its better, but still not quite right.
I am thinking about replacing the shift cable and possible the derailleur even though it seems ok.
Hold on here. No need to replace the chainrings.
You didn't list replacing the chain, so I assume that you didn't - in which case, replace it. A used chain running with an equally uneven freewheel (or cassette, as you indicate; I assume you therefore swapped the rear hub at one point or another) will almost always skip. A new freewheel/cassette with the old chain will cause similar problems, as the wear remains uneven.
Put a new chain on with the new freewheel/cassette. Should work.
-Kurt