Honday city engine noise on d3 going downhill

[softchips]

Hi,

I have 2018 Honda city 3000 KM driven. Recently i visited Naran. Going to naran was all good but during our way back. Engine made weird sound like someone is using motor saw to cut down trees. (I actually thought sound is coming from somewhere else and not from car). Sound was coming when i was going downhill using D3 or D2 and car speed increased to like 40-60. There was no noise on low speed.

My question:
is this normal ?
I should have used brakes and reduce speed?
How bad this is for transmission?
What is proper way to drive in hilly areas?

[faridahmed]

i believe it is notmal
this is due to engine braking, in this rpm do get high
during downhill brakes should be used less and best is to rely on engine braking which you did, else brakes gets hot and in worst case might give up.
also remember if God forbid you start to smell that burning smell from brakes after extensive usage, stop and let them cool down on there own, don't ever throw water on them

don't think it is bad for transmission, its the engine which is braking
i have daihatsu move with cvt, if i lock it in B(lower gear) i see my rpm high too on downhill