The older front shocks in the TF 2.5 kit can allow the front to flex far enough to damage the front driveline boot and also damage the break lines. The newer kits come with a little shorter shocks than the older kit, limiting travel.
I had the older kit with the longer shocks and spoke with TF about this. They were, as usual, very helpful and I ended up getting the newer, shorter shocks just to be safe.
I realized that it was a great idea while installing them. I lifted the front of my Jeep to allow the shocks to extend enough to make the swap out easier and found my brake lines were tight as a banjo strings! Could have been bad, bad out on the trail some where.
The new shocks were about 2" shorter and felt like I was going the wrong way. Why am I trying to limit travel? shouldn't I be spending the money on longer brake lines and a new driveline instead?