Before and After..Belltech 2" shackle install
#11
You caused the vibration not the 2? drop. you think the factory would allow 1000 lbs in the bed to cause a driveline vibration!?!?!
The shim didn't hurt anything but there is no need.
#13
Senior Member
Installing drop shackles is not the same as putting a load on the truck.... Drop shackles on these trucks will effect the u joint angles much more than the older trucks that have shorter leaf springs.
#14
Just remember to make sure the pinion shims are mounted fat side to the rear. The other way around definitely didn't work.
#16
Instead of guessing at which shims you need, you can take the truck to a shop and just have them measure your pinion angle. They'd be able to tell you exactly what you need.
#20
Senior Member
The urge to drop the front will hit in a few months, if not sooner... trust me.... But it looks great!