my issue is that i have a 6.0 lq4 out of a 2004 silverado 2500hd and it has terrible vibrations around 1500 rpms, and 2500 rpms. It does this in neutral, park and while driving. i've checked my motor mounts and transmission crossmember mounts and they are all good and have under 2000 miles on them.
1994 yj stretched, locked and loaded - 6.0l vortec lq4, 4l60e, np231, Dana 44s 37" interco trxus m/t, 3.5" bds front leafs, double triangulated 4 link rear on xj front coils.
1997 ZJ limited - BONE stock
2003 tj - 4in skyjacker, 33" mickey thompsons
my on board alternator/welder write up
my tj 1/2 doors on a yj write up
RC vs BDS