Turbo Whine? Turbo Leak?
This truck is my first diesel and first turbo, so it's all new to me.
Truck: 2008 F350 4x4 CCLB, 6.4, stock (no aftermarket upgrades), 47k miles
I tow a 9k lb travel trailer once or twice a month on average and I have noticed this on my last 4 tows. On long hill climbs, the boost will go over 30 PSI and if I keep it there, I will almost always get a whine type sound that corresponds with the boost (if the boost decreases, the whine decreases; if the boost increases, the whine increases). I do not get the whine unloaded, only when towing the trailer.
Any ideas? Could it be a turbo leak? Where would I look?
I bought the truck in September. The truck was in the shop for service in January due to a bed plate oil leak and they did remove the cab to fix.