Hi.

I have a 96 Legacy Station MT.

When at 120KPH (75MPH) in 5th and I take the foot of the acceleator, I can here a strange metalic rattle sound from what I think is the rear part of the car.

 

this only happens on long trips. I have tried to do this parked at 3500RPM but just cant.

 

any ideas on this?

 

Thanks.

George.

Heat shields on the exhaust have a tendency to rattle. They can be tied down with clamps/jubilee clips.

 

Sometimes the thin aluminium shields on the car can work lose and touch the exhaust piping. Same kind of noise.

 

Either way they can be a pain to replicate under controlled conditions.

 

Get the car up on a lift with a helper in the car to rev the engine past 3000rpm and let them drop again.

GO underneath with a rubber hammer or a chunk of wood and bang on the exhaust heat shields, pretty soon you'll find the one that makes the noise you are so familiar with.