No issues at all. I have the Diff Drop on the truck. TRD Coils are $298.00/pair and the Bilstein 5100 preload adjustable shocks are $199.00/pair from
Wheeler's Off Road
They will assemble them as well, the cost I forgot, but it was not a lot (less than 50). The truck handles more stable than before. I also have the 5100's in the back, so the whole truck is a little stiffer. But still a great ride. Very smooth. not choppy. Hope this is helpful.
I did the install myself. Took about 2.0hrs.