[QUOTE=Jon_Alex;37742194]What kind of vibration? Like driveline (high frequency vibes that show up at a certain speed), or more suspension related shimmys? What lift did you install? Did you square the axles? Balance the tires? Alignment/toe-in? Check trackbar bolts? Driveline balance?
My rear pinion is maybe 1 degree lower than the driveshaft. Basically you point it at the t-case output and maybe lower it one degree. Do you have a tummy tuck? If so is the t-case rubbing anywhere on the tub?
What's the logic behind pulling the springs again? Why would you pull the front driveline? To get it balanced?[/QUOTES
Here is the back story. 04 Lj. Zone 3 in lift, 8 metal cloak arms, front and rear MC track bars, 4:88 gears, Detroit tru tracks front and rear, SYI, all bearings and u-joints are new in front and rear axels, all new ball joints, all new tie rods, new unit bearings, new motor mounts, new trans mount, transfer case complete rebuilt.
Let's put it this way, with the exception of the transmission and the engine the entire jeep is new. Maybe 2000 miles on all of it.
The vibration starts at about 50 and gets worse as speeds increase. Tires and wheels are also new and have been road force balanced twice.