Originally Posted by
Seachicken
Drive chain doesn't seem to be the problem (no light showing through), but it seems the freehub thing could be the problem, though I'm perplexed about how it would work fine on that one gear
Sounds tome like the chain and freewheel/cassette are worn. More than likely the cahing and freewheel/cassette were used in all the combinations a lot except the one that does not give you the noise or skip