Is anyone running factory 18s with a RCX 5 or 6 in knuckle lift? I want to run 295/70 or 305/65 tires, and want to keep it mostly stock looking except for the height. RC says it should work as long as I a 1/4" spacer, just want to see someone else who has done it...
Well there goes that theory...
I had a Nissan 350z and Hyundai Elantra which I drove over 200k miles combined, and they were virtually trouble free. My wifes Toyota FJ after 10 years is still rock solid, though we are about to outgrow it and need more room for the the kids. I guess I can cross the Tahoe off the list now.
The frequency of vibration I have in my truck cab is 18 Hz +/- regardless of speed, the amplitude just gets higher at 76-80 mph. The truck bed also vibrates at 18hz. My guess is that the truck bed is vibrating due to harmonics, which causes the rest of the truck to shake. And I'm going to guess that trucks with caps on the bed may vibrate less than trucks that dont have them because it adds mass and may act as a stiffener. I also would be willing to bet that loading the bed at the tailgate with enough weight will mostly eliminate the vibration due to the dampening effect and/or change in natural frequency.
Another potential would be to use some rubber grommets between the bed and the frame to help dampen the vibration.
Very nice. The more I see trucks like yours the more I think I should go with a 6-6.5" lift and 35's vs the 4.5 and 33's like I was planning. Do you know the overall height of your truck?
I currently average 17-18 mpg in a '16 5.3L 6 speed with 3.42s, and have a shop lined up to install a zone 4.5" lift and 33s. What sort of mpg should I expect from it after? 14-15?