Piston slap, rod bearing could be a couple of things. How many miles???? What RPMs??? To do any real meaningful diagnosis you need to pull the pan so you have to make sure it is really the bottom end and not the timing chain.
A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models!