http://www.universityofcalifornia.edu/infocenter/transfer-admissions-summary can show you transfer admit rates by UC campus and GPA. For UCSD in 2014, 86% of transfer applicants with 3.60-4.00 GPA were admitted, but only 36% of those with 3.20-3.59 GPA were admitted. Unfortunately, intended major cannot be indicated, so you cannot see any selectivity differences by major.