ORIGINAL: KeithjV
Glad you got it running. But no it shouldnt bottom out at only 3 feet. You should try a heavier weight oil in the shocks. Maybe adjust the preload too
HF diffs are definately weak compared to most decent truggies. They will wear out fairly quickly. But shim and ensure bearings are ok and the plastic diff cases are ok and you will increase their life by a long long way.
Remember the chasis is designed to absorb impact, not just the shocks. I use 60 weight over 8ft high jumps (HF aprox 15ft in air) and the chasis hits the ground hard most times with no dramas.