Turbo diesel truck issue

I have a 2005 Ford 6.0 power stroke diesel truck. I've noticed when I'm pulling a load especially at the hill but I get a huffing which seems to be turbo pressure being released.
 

This morning I was on my way to the track and it was doing it a lot and I also noticed this time that my little turbo gauge would reflect that I was losing pressure every time it huffed. Does anyone have any guess what this could be? I have a video of it but can't figure out how to upload it to YouTube and then Lincoln here.

Sounds like one of the intake hoses is coming loose or has a weak spot causing expansion and pressure release.  I'd trace them from turbo outlet to the intake. Just a SWAG.

Are those VGT or fixed geometry?

I'd also guess boost leak somewhere, and it has just gotten bad enough that you're overspeeding the turbo/off the edge of the compressor map and it is causing some weird dynamics. If it's a VGT, sometimes the the leak can be enough to cause the controls to do weird things but not quite bad enough to set a fault, or the actuator can stick and cause strange things.

Probably boost leak. There's a chance the VGT actuator is getting some carbon buildup and doing something funny, but that's less likely.

Oh god, my condolences.  I had a 2006 6.no F250-.  It's the everything.  Sorry.

When was the last time you changed the fuel filter?  If you get a fuel restriction, the computer notices it and opens the VNT (or wastegate deending on the application) to defeat turbo pressure.

Funny, I just changed the lower filter but couldn't get the cap off of the top for fear of breaking the plastic.  I ordered a metal one and will replace the filter asap. 
 

it does seem like it could be related to the turbo's variable vanes. 
 

perhaps a dirty sticking turbo but that doesn't, to me, explain the short quick drop of pressure and immediate regain. 
 

The vane controller perhaps. 

Vane controller, possibly, but it's not exactly a common failure.

Since they don't have a throttle, the intake pressure will drop almost immediately when the vanes open.  The pressure pushing back on the compressor and the sudden loss of torque from the turbine... additionally the lack of any throttle to keep the pressure from blowing in the intake valves means that the pressure has all kinds of places to go quickly.

The position of the vanes (input torque or lack thereof) at the turbine has nearly instant effects on pressure (or not pressure).  It's one of the reasons diesels are so well suited to small-ish turbos.  Lots of exhaust mass to spin things, relatively low weight of spinny components, no throttle.