I think I've tracked an annoying rattling sound to the sturmey archer x-rf5 hub on my bike. For quite a while I'd assumed it was the chain but I've ruled that out now. The noise occurs when I'm not pedalling and I ride over rough ground. . . and it sounds to me similar in tone to the sound of the IGH pawls engaging as one starts to pedal. It doesn't matter what gear I'm in. So I'm guessing that the rough ground causes the pawls to sometimes rattle loosely against the surface that they engage with. . . which makes sense to me as someone who's not yet dismantled an IGH fully and has a limited understanding of the design.
Does this theory sound plausible? Is this a known problem with IG hubs? I'm figuring that regreasing might solve the problem but that it might also be a sign of something being too loose/requiring tightening?
I'm planning to dismantle the hub this week and all advice is greatly appreciated as I'm finding the prospect of the task a little daunting.