Our OT+ has developed an exhaust rattle that we only hear at low RPM when that RPM is held. It does it in all drive modes and is definitely from the rear muffler area. I've inspected and there is nothing loose externally. Pretty easy fix but just curious if anyone else's is doing this?
GX 550 OT+ exhaust buzz low RPM
- Thread starter okcG24
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This is still pretty bad on ours. Considering a catback or removing rear muffler. It's not so much a rattle but more of a buzz or harmonic resonance at low rpm. Goes away when you get up in the rpm range. Maybe something inside the rear muffler maybe. Anyone else have this?
I haven't tried it (picking my GX up tomorrow) but it appears MagnaFlow has a system for the GX. I saw it on the MagnaFlow website.
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Soooo...
About 7k miles on the truck and the buzzing sound is still there. Right between 1250 and 1400 rpm, any driving mode. Still sounds like harmonic resonance but can't isolate where it's coming from. I crawled under and checked everything again today. Nothing loose. Nothing rubbing. Messed with heat shield, add felt wedges around the heat shield and it's still there. It really sound like it's inside the exhaust system, very weird. I wish I could swing the NYTOP muffler delete and I may just do it since nothing else is out yet.
Dealership was no help on two occasions telling me to record it.
I think I'm gonna disconnect the rear piping just after the main muffler and pull that whole section out and see if it goes away.
It's definitely coming from that rear driver side area.
I'll report back. Can't believe I'm the only post about this. If this works, I will have a shop cut the rear muffler out and just dump it lol.
About 7k miles on the truck and the buzzing sound is still there. Right between 1250 and 1400 rpm, any driving mode. Still sounds like harmonic resonance but can't isolate where it's coming from. I crawled under and checked everything again today. Nothing loose. Nothing rubbing. Messed with heat shield, add felt wedges around the heat shield and it's still there. It really sound like it's inside the exhaust system, very weird. I wish I could swing the NYTOP muffler delete and I may just do it since nothing else is out yet.
Dealership was no help on two occasions telling me to record it.
I think I'm gonna disconnect the rear piping just after the main muffler and pull that whole section out and see if it goes away.
It's definitely coming from that rear driver side area.
I'll report back. Can't believe I'm the only post about this. If this works, I will have a shop cut the rear muffler out and just dump it lol.
