Trailer thud on acceleration normal?

[ItsMyFirstTime 0]

I just brought home my 2018 Supreme S211 and while towing her home I was getting increasingly concerned about the very pronounce thud on acceleration.  It isn't just a little play in the receiver.  I just sold my Yamaha which had surge brakes on it too and it never did that, but it was also only half the weight of this beast.  Are the rest of you experiencing this too or should I be concerned?

Edited May 28, 2019 by ItsMyFirstTime

[DrPringle 10]

Sounds like just the surge brakes to me 

[Wylie_Tunes 146]

Low brake fluid/air in lines would be my first guess. 

[TexP51 6]

- Check brake fluid level in reservoir.

- Check that the flex brake line quick-disconnect between reservoir and trailer is connected.

- Cycle the surge brake actuator by hand to see if you have back pressure (on tongue)

- See if hydraulic actuator (mini-looking shock absorber) in tongue is connected.

- Check for brake fluid leak @ drums. 

- Bleed air out of brakes