Icon 1.5 inch Progressive AAL Overload in

Has anyone else used this leaf pack and left the overload in? And used 3 degree shims as well? I left the overload in as Icon states to remove it. I also added 3 degree shims, and the OME carrier bearing drop kit. Have a small shudder in the rear from about 15 to 25 MPH. Wondering if adding the shims actually caused the problem? Also I do zero off road use, and pretty much no hauling. Wondering if I should just buy an actual leaf pack and go from there or I don't know what to do.

 

not the icon but I have the wheelers hd 3 leaf pack and left the overload in with axel shims. had a slight vibration. put the ome c/b drop in better but still there. took the shims out left the c/b drop in and that was even better. I bought the st tacos c/b drop but had a lot of things come up and never got to put it in. don't know if taking the shims out will help you out or not? I know all trucks are different and im a short bed.

 

Thanks I'm taking the shims out as that I believe is the issue