vibration problems

So my 2011 regular cabn 4x4 has has a vibration that starts at right around 25 MPH and lasts to around 29 MPH. Im not sure where it is coming from but it seems to maybe come from the rear of the truck. It happens nearly every time upon acceleration and deceleration. I know it could be a number of factors but has anyone else experienced this as well?

 

torque your U-bolts to 90lbs. toyota only torques them to 37 lbs from the factory which is not even close to enough seeing as how they hold the rear axle to your truck. thatll fix your problem

 

No lift. I believe I have axle wrap as it is called. I feel the pop/jolt when I nearly come to a complete stop and once again once I let off the brake or begin to accelerate

 

I think that might be the drums in the rear settling. My truck does it everytime I start/stop

 

my truck doesnt do that, no pops or jolts here

 

Rear drums huh? I can see that... still dosnt completely explain my vibration so I will try torquing my u bolts

 

Any fix for the rear drum issue?

 

Just realized my truck dosnt do it hardly any at all if at any when in 4 wheel drive