TJ repetitive hum?

seanlyder

New Member
Joined
Apr 12, 2021
Messages
1
Location
New York
Just bought an amazing 06 with 89k miles only thing is ...
Occasionally when i hold the gas at about ~50 mph i can feel from the seats and console a hmmm...hmmmm...hmm.

It’s a repeating “vm” / “hm” sound sounds like from the engine.

Any insight?
 
A harmonic hum or vibration would make me look for a bad transmission mount or motor mount or maybe someone replace one of them with poly instead of rubber.
 
Sound like the dreaded driveline harmonic vibration.
is your Jeep lifted?
Stock rear driveline or CV with SYE?
Adjustable rear control arms?