Vibration while braking on '11 Taco

I have an '11 Double Cab PreRunner with the 2.7L 4cyl.

When I start the truck in the AM, for about the first 5 minutes or so, if I brake while turning I'm getting some vibrating that I can hear and feel in the brake pedal. The brakes perform normally but I'm not sure how "normal" this is.

Any input?

 

Haven't felt anything like that. Definitely bring it to the dealer.

 

It's actually there right now. They're "evaluating" it for the rear TSB and I just called my service manager and asked him to take a look at the brakes and described the vibration.

It's odd because it feels like it goes away as the vehicle warms up. Could be my imagination though.

You hate to just ignore these things and hope they go away on a brand new vehicle!