Hub gear keeps jumping up a gear

Totalnewbie
Totalnewbie Posts: 932
edited July 2007 in Commuting chat
This is really more of a know how thing. But my bike is neither a road bike nor a mountain bike, it is more of a 'town bike', and anyway other hub-geared commuters may be able to help.

My hub is a 1988 3-speed Sturmey Archer. It has lately decided it does not want to stay in 1st gear (which I used a lot as my knees are not too great and I like to spin in a low gear to protect them) and instead keeps jumping up, not clicking quite into second gear but it feels like second gear - the resistance on the pedals increases.

To make it change down, I have to click it up into 2nd and then back down into 1st. But then it changes itself up again shortly anyway.

I have tried to adjust the gears (fiddling with the bloody things all weekend!) using both the official 'looking through the view hole at how it's aligned' method and also Sheldon Brown's chain tension method which he says is more reliable. Neither has worked, but that could be me not doing it right.

Any other suggestions? I knew there was a reason my old bike was a SS! Ta.