New rear shocks making noise

[sully14324]

I just installed new rear shocks on my 2011 XLT (Monroe 71139). I did not replace the coils. Now when I drive on rough roads or over parking lot speed bumps I get an awful rattle from the rear end. When I get under the truck and bang on the coils with a rubber mallet I can replicate it. I have checked all nuts and bolts and everything is tight. The ends of the coils seem to be seated properly. Any thoughts?

 

[tonydiv]

I'd bang on that spring with the mallet and then grab different pieces of the spring, mount, etc and see if you can locate where the rattling is coming from. You could wedge a screwdriver in some of the tight areas if needed. You will eventually find where it's coming from.

 

[sully14324]

Thanks. I'll give it a shot.

 

[Christopher]

Strut mounts are bad. Just happened to me on 2008 navigator after bilstien strut install....