Steel Soldiers now has a few new forums, read more about it at: New Munitions Forums!
Microsoft MSN, Live, Hotmail, Outlook email users may not be receiving emails. We are working to resolve this issue. Please add support@steelsoldiers.com to your trusted contacts.
.
Is is possible that the low pressure (suction) hose has a crack in it and is possibly sucking air?
That could make a whining sound...
You could wiggle the hose with a "Soldier B" at the controls to turn the truck OFF while you wiggle the hoses.
It isn't quite like searching for a vacuum leak...