2nd Gen Non-Engine/Transmission Strange sound

[Hobart]

If I suddenly let up on the accelerator (while going up hill in low) I get a flopping hollow sound that lasts about 1/4 second. Any ideas?

 

[ToolManTimTaylor]

Simply Do a search on "Turbo Bark"



It is when the inlet pressure outdrives the exhaust side of the turbo when fuel is suddenly reduced. The turbo in a sense reverses direction and redirects. It sounds awesome but is putting a ton of stress on the shaft assemby and some make it through one bark some bark like a kennel.



Here:



https://www.turbodieselregister.com...-bark-what-turbo-do-i-have-holset-thread.html