Squeal when accelerating from stop

Need some input here. I've got a squeal when accelerating from a complete stop, i.e. stop and go traffic, that I can replicate it most of the time. It seems to be coming from the rear end and sounds to follow the rotation of drive shaft/rear end/rear wheels. It's most noticeable when first starting off and then tapers off through 2nd gear. Doesn't do it from a rolling stop.

I had the "master" tech at the dealership ride with me today and naturally it didn't do it a single time. He was leaning towards the rear drums having brake dust build up and suggested I set up another appointment when I could leave it with them so they could a rear drum clean and service.

Any thoughts?

 

My leaf pack is already squeaking and I only have 35k miles. Could be the leafs or what the tech told you. When you get a chance try to bounce on the truck in the rear and if it squeaks it’ll be your leaf pack.

 

I don't think it's the leaf pack since it follows the rotation of the drive line but I'll check it out.

 

How many miles?
Are you 4wd?
Have you been greasing the driveshaft u-joints?

 

i had that happening with my truck around 10k or so, turned out to be a problem with the driveshaft. they replaced it and it's been fine ever since.

 

50k, TRD Sport 2wd, no zerks on mine to grease...

 

Here's a clip, sorry for the road noise...

 

Carrier bearing?

 

That's what I'm thinking after hearing the way the squeak 'spools up'.