Rear thump when going over sharp bumps - Resolved

[TedC]

Replaced both rear muffler hanger insulators. Old insulators allowed too much uncontrolled up and down muffler movement. I had the same issue on my 1988 but never traced down the cause. 30 minute job.

Corvette Muffler Hanger Insulator, 1989-1996 - Corvette Parts and Accessories

 

[boomdriver]

Thx TedC,

Just went thru the same stuff on mine....
suddenly I have a roaring-gurgle back there and I'm thinking I blew out a muffler...

what it did bloow out or off, was the rear Y pipe had broken 1/2 between the muff and the welded splice because the muffler hanger allowed wayyyy too much movement and every bump, speed bump, pot hole, every corner that was taken forced the Y-pipe to absorb all the stress of the weight of the muffler as the hanger went slack briefly. PP design. So, my Y-pipe broke.
I got it patched together for now, but it'll require a whole new rear Y to fix it properly...Hated those mufflers anyway.

 

[John Robinson]

Here is my solution to that problem.

 

[TedC]

That works.

Did you notice a change in the exhaust sound in the cabin? Sounds just a little different since the change, which I actually like better.

 

[John Robinson]

Yes the sound was a little less tinny with more throat in it.

 

[Robertwav1]

Innovative......I must check mine!