Originally Posted By PaulV
Originally Posted By nippymog
...We all know the drive is very lumpy with big torque spikes many thousands of times a second at speed.
...

3000rpm = 50 revs per sec.
1 rev = 1 firing of a cylinder.
Would that not be 50 torque peaks per sec? Probably you meant many thousand times a minute wink
Signed Paul the Pedant

Could very easily be connected to this. A nice 50hz howl at 3000 rpm when on a light load which would allow the cogs to vibrate against each other might sound familiar to some folk. My bevel box produces minimal noise (amongst the general cacophony at least) when under a heavy acceleration load or on the over run.
Ergo, drive it like you stole it. No bevel box noise. cheers

Calum
M3W Vol1
Vol2