im a bit deaf (a lot being a boilermaker) so not 100% sure where sound is emanating from defiantly a high pitch whine. Realise now it shouldn't be front diff but somats not quite right .Thought it was diff due to the noise stopping as soon as I took foot of accelerator and coming back when I put it on again. Gonna get a mechanic to give it a full service and check all out.Was told it had been given a full service before buying it ....but for pice of mind I think I should....any good 4x4 mechanics in Redlands qld ?