Transferring to UC Berkeley - UC to UC Transfer

Hello! I just SIR’d to UC Berkeley yesterday night and plan to transfer from UCR. Before I withdraw from UCR, I just want to do some research about my classes and how likely it is I would have to retake some. I’m admitted into Letters and Sciences and will major in Economics after declaring the major. I don’t have UC reciprocity as of right now, but I have taken classes in most sections of the 7 course breadth requirement. Does anyone have experience transferring to UC Berkeley from another UC campus? Would appreciate any feedback!