Looking at the djm 5" rear setup for 180 $ and was going to do the 3" drop up front. Only thing holding me back is the driveline vibration thats possible.

Can someone please educate me on this? I wanna lower is eityer 3/5 or 2/4 but idk anything about lowering trucks and what issues can come about.

 

No vibration here with 3/5 DJM on 07 FX2.
I have a 2 piece driveshaft so I put the mcgaughys bearing carrier kit to eliminate the vibration...but supposed to be able to do whitout since you can indefinatly adjust the pinion angle with the DJM flit kit.(I have not been able to do, so I didn't bother and helped myself by installing the kit.).

shouldn't be an issue at all with a 1piece driveshaft.