How might one isolate the cause of the vibration? The tires are 16" radials with less than 5k miles. They were balanced when new. At that time, a bent rim was discovered and replaced. I'm running a SM420 four-speed with an open drive shaft (custom built and balanced). The rear differential is a 1956 3100 with a 3.90 set of gears. IIRC, the original three-speed on the floor, enclosed drive shaft and 4.11 rear end also caused the mirror to vibrate. The cab mounts were also rebuilt/replaced.
I was wondering if that's just the way it is, or if there is in fact a problem with a potential solution.
Last edited by HandyAndy; 01/06/2022 1:59 AM.
