10 After spending a short amount of time on the monotube shocks, it was time to beef up the rear and match the front. As soon as the rear double bypass shocks were made, I got them installed and tuned on the truck. Remember that rear end smack/bump feeling coming from the back of your FJ/4Runner when bottoming out? Gone. The new springs and shocks combine to offer a smooth, yet controlled ride even when the terrain gets rough.