A truck will ride harsher with "high end" off road shocks. As mentioned, the valving is different in HD shocks than in factory shocks. This is so that the HD shocks can control the heavier use of an off road vehicle. Different brands will have different behaviors. Shocks designed for a heavier truck will be harsher than ones designed for a lighter truck, on the same truck. Likewise, standard duty, medium duty, and heavy duty shocks will ride progressively harsher. As you add weight - gear, bumpers, winches, racks, jacks, etc. the ride will soften in response to the added weight.

 

I took the standard height (and duty) Terrafirmas.

Maybe throwing a bullbar on the front will make it more comfortable, eh?

And load it up in the back

 

I installed the Terra Firma + 2 shocks and springs three years ago , Yes , my kidneys burst . But , I discovered that with new tires , the ride was more soft . Off roading is going to hurt your organs . Maybe lower tire pressure .

 

Cheapest way to fix this is lower tire pressure. Not sure the specs for your tire but keep safety in mind, a coffin is cushier but you don't want to be in one. I had medium duty on my old D2 and it was quite a bit harsher, but evened out pretty quickly. I did take it through Death Valley and at least 50 miles of harsh washboards so that probably did it. Putting extra weight will soften it, but bumpers can be pricy and adding weight does affect stopping power depending on your brakes and other added weight. Food for thought.