tinysq

iTrader: (1)

when above 2.5k revs and lift off i get a graunchy whine from the engine/gearbox, any ideas what this could be?

tinysq

iTrader: (1)

I take it nobody knows then?

Jolly Green Monster

iTrader: (4)

one of the bearings perhaps.. although may not necessarily be gearbox.. could be spigot (centre of flywheel) or rear prop support bearing.. would need someone to listen to it to know for sure.

other possibility is a diff.. difficult to know more from text etc..

Simon

tinysq

iTrader: (1)

what can i do to uprate the gearbox so it can take more power/torque and abuse?