While doing the lift on my 2018 Jeep JLU Rubicon we found that there was a bad factory weld on the front lower control arm bracket. We took the jeep into Antioch Jeep Chrysler Dodge in California. They took photos and sent in to be reviewed as a warranty. Of course they came back and denied repair due to the modificications done to the Jeep. If it wasn't for us doing a modification to the Jeep we would never of found that a weld was completly missed at the factory. URRGGG. Any suggestions on how to go at Jeep for this with out loosing my temper on them?