Brakes "bucking" after stopped

[SausageGuy]

When I stop hard at a light truck settles then surges"bucks". Not if i stop regular just if a hard stop. Figure it is one of the brake relay valves that I am not familiar with yet.
Seeing if someone can point me in right direction.

 

[Suprman]

Are you sure its not driveline related? Sometimes the throttle assembly on first gen trucks takes a bit more time to come back to rest position. I usually have to add better springs to the throttle return.

 

[tennmogger]

Maybe too high idle and the trans doesn't shift until stopped. Try lifting the go-pedal with your toe before you stop.

 

[Ronmar]

Sure it is the brakes and not the cab suspension? Does it behave differently with the cab air off?

 

[SausageGuy]

It is usually when a light changes and I can not make it thru light type stops.
I can try stronger springs on throttle.
Definately not cab air ride. If I am not on brakes hard it wants to push truck forward a couple feet.

 

[19Detail]

Mine bucks a bit when it shifts to 2nd gear after I stop. I always thought it was a transmission issue

 

[SausageGuy]

I am starting to watch trans display when I stop to see if it is the transmission finishing down shifting.