just so we're on the same page, i have a 2.5" poly spacer lift up front and the tsb+2" blocks in the rear...not sure if that rear counts as 2" or 3 1/4" b/c of the tsb...anyways...i was getting vibes from 55mph+ while accelerating and vibes 20-25 mph while stopping. i was also getting the clunking while coming to a stop/starting off. i added the toytec shims to the rear and so far i have no more vibe issues. no clunking at all and no 20-25 while stopping. i havent felt any while over 55, but it was limited driving over that speed, so i'll definately have an update after this weekend since i have a 1:45 drive each way to guard this weekend. just letting everyone know that the $25 for these is a good pick up. if u buy a lift kit from them and order these at the same time, it'll only be like $15 b/c they'll combine shipping.
and on a seperate note, after adding the 2" block, i had to get some 2" shock extenders b/c the stock rear billy's were fully extending. havent had any more issues w/ it and was only $6 for the entenders, instead of $150+ for all new shocks (will do that later on).
so janster, u see any issues w/ this stuff while offroading? i got under there today and took an impact wrench to tighten the u-bolts, so i'm pretty damn sure they aren't moving anywhere