[seaneparker]

Hello -

I hope someone can answer this...
I've added rising/falling tressels to our layout - but now the engine squeals as it goes down hill - and only on the straights. It doesn't squeal when flat, or going downhill on curves - which leads me to believe it's something to do with the center-4 wheels (it's a 2-8) of the 8, which only glide over the track on the curves - any ideas?
I've oiled axles, etc.

Thanks
Sean