<p>This is really no different than re-financing a mortgage or any other debt. You need to visit a few banks and get a reading on whether they will be able to loan you funds at a better rate, based on your credit rating and that of the co-signer. Someone with better math skills than mine should calculate what your current effective rate is on the full amount, so you can compare apples to apples. You may just want to refinance the 11.3% loan if turns out the others are at competitive rates. They all don’t have to travel together. Good luck.</p>