Noise from back of car when driving on the motorway

[imydaking]

Well my sister crashed into the back of my car a few weeks ago ! (shes a retard!) aside from the bumper being slightly bent car is fine

anyways since then my car makes a weird noise when driving on the motorway it tends to happen when i let go of the gas you hear a sort of groaning sound kind of like rubber on a wet surface. It doesn't always happen.

also makes a grinding sound when braking sometimes. I have had the usual discs and pads checked and they are all fine car stops fine and no fluid is lost.

its hard to describe the sound almost sounds like it could be a rubber bush but am not sure. Could it be the exhaust? i have checked it and it looks fine and its bolted up properly.

i know this questions a bit unclear hope someone can help.

[tarzan]

was it a bad crash. get a few pics of it. and people could have a better idea of what it might be.

[imydaking]

was it a bad crash. get a few pics of it. and people could have a better idea of what it might be.

nah mate nothing at all there isnt anypoint in putting a pic tbh

there is a veryyy slight bump in the middle of bumper thats all and bit of plastic broken at the back but am thinking it shook something else at the back
it was at 5-10 mph

[heliosuk]

Probably hit the tail pipe as well an pushed the exhaust out of alignment. This will cause what you are hearing.

[imydaking]

Probably hit the tail pipe as well an pushed the exhaust out of alignment. This will cause what you are hearing.

thanks mate that makes sense :) will get it checked out very soon