Has anyone here experienced exhaust drone with an aftermarket exhaust AND installed a resonator after the fact that DIDN'T cure the drone? The reason I ask is that I bought a Dynomax cat back with the Ultra Flow muffler that sounds great except for when I'm cruising around town between 45-50mph. It's when the engine upshifts to 5th and the rpms drop to around 1300 that I get a head splitting drone from the exhaust.
This is the only time it happens and yes, I know I can downshift to 4th but I'd rather just lose the drone. I wouldn't mind if the resonator makes the entire exhaust range more quiet so long as it takes away the drone too. I'd just hate to have to pay for a resonator and cut the pipe only to find out that it didn't affect the drone at all.
Most of my google searches result in people recommending someone else try one for his or her drone problem yet I've yet to hear back from someone who purchased one and had it work specifically on the drone.
UPDATE: Okay, so I bought an Aero Turbine AR25 because ourdealsrock.com had one for $45. Unfortunately for me, it didn't cure the drone. On a positive note, the entire rev range sounds better with it but when the automatic upshifts and lugs the engine, the exhaust booms big time. So as per Dynomax's "sound guarantee", I'll exchange the Ultraflo out for the Super Turbo.
So since I've updated my situation I'll update my question out of curiosity.
Is there anyone out there with an aftermarket exhaust AND an automatic transmission that doesn't have low RPM exhaust drone? If so, what exhaust do you have or what steps did you take to eliminate it?
Final Update: I installed the Super Turbo muffler and it did not fix the problem. I do think the Super Turbo muffler sounds better and I prefer the way the engine responds with this muffler vs the Ultraflow but the drone still exists when the engine bogs due to the automatic transmission. I tried the new muffler with the resonator and it didn't make a difference at all. If I had a 6 speed then there wouldn't be any problems as I wouldn't let the engine bog like the auto does but until Toyota revises the gearing (worse mpg than auto) and fixes the rattling clutch/throw out bearings, I won't touch another one of their sticks. Sadly the stock exhaust is going back on this weekend.