Mud Flap Flap Flap

Probably depends on which way the wind is blowing but I have never noticed them banging.

peedee

Not something we've ever been aware of. As peedee says might have been parked position. We've been out in very strong winds too. Are you sure it was the mud flaps??

Drill a hole in the bottom edge of the mud flap.

Thread a piece of cord through the hole and tie a knot at the back that is too large to pass through the hole.

With the cord pull the mud flap forward as far as possible, against the tyre, if it will go that far.

Pass the free end of the cord through the wheel spokes and tie off.

Alternatively use a suitable length of light chain with suitable hooks at both ends and attach to an alternative anchor point.

Do not forget to release before driving off.

Another way is the pull the mud flaps backward and anchor to some other part of the vehicle. As long as the mud flap are kept under sufficient tension all will be silent. the advantage of this method is that if you forget to undo them the flaps should come to no harm. 

Stuff a couple of sponges from Poundland between flaps and tyres.

Had exactly the same problem at Keswick this weekend. Drove me mad so at 1.30am had to get dressed and go out with a torch to investigate what the noise was.......

Temporarily cured it for the night by wedging a plastic step against one mudflap and a waste bucket against the other....

Back at home, yesterday, I have drilled a small hole in the mudflap and a corresponding hole in the inner plastic lip of the wheelarch. I then locked the mudflap to the wheelarch using a clear translucent cable tie and the "modification" is invisible.  The mudflap hangs neatly still in the vertical position.....

Never  had  that  problem  with  Mud-flaps,  must  be

the  lack  of  cleaning  &  thus  the  increased  bulk

not  allowing  that  amount  of  movement   ?

But  Did  have  a  noise  problem  with  the  reinforced

rubber  strap  between  cab  roof  and  the  front  panel

on  my  E/R  Trooper.  strong  over-night  wind  started

it  vibrating  &  thus  amplifying  the  noise  on  the  two

metal  panels  !  Had  to  drop  the  roof  to  avoid  the

neighbours  complaining   .  { Them  deer  &  midges

really  know how  to  drive  a  complaint  home    !  }

Not suffered the mudflap noise so far, however we were driven mad with the drip drip of rain dropping off the rain strip above the habitation door and falling on the plastic trim around the van. Never had this before, must have just been the angle we were parked. Have had it dripping off the roof and plopping on the sticky out bit at the back of the van, right by my head, I have to get up and put a sponge or cloth to stop it OH sleeps through anything short of a hurricane.

I can only think those having problems with mud flaps flapping in the wind have very flimsy ones.

Peedee

Had a similar problem with 1 of out mud flaps. Knocking against a pipe when the wind was blowing at a certain angle against the van.  Drilled two holes in the flap and used a cable tie to pull it against the pipe it used to knock against. Peace and quiet ever since. 

Ah yes, that must be it...