[acr]

I changed out the 2.75 ring & pinion for a 3.50 & now have a small annoying exhaust resonation/vibration from about 1700-1900 RPM's. I can live with it but it's annoying the wifey (no I don't want to get rid of her!!). Any ideas? Exhaust system & car as follows;
1936 Plymouth sedan fully insulated & full interior.
SBC 350 w/Rams Horn manifolds, 2.5 inch pipes, "H" crossover & 50 Series Flowmasters w/SS megs for tips. Also, system sounds very good & I'd hate to loose that. Thanks.

 

[Max Keith]

exhaust resonance

Im curious as to what kind of exhaust hangers you have on your vehicle. Are they solid metal straps or do they have a rubber strap or bushing in them?

 

[acr]

Rubber bushings front & back but I just found a loose hanger in the rear on the passengers side. Maybe you solved my problem Max!

 

[Max Keith]

exhaust resonation

LOL, sounds like it. What I was going to recommend is going to the metal strap hangers with rubber straps between them and the clamps.