My mom has a vehicle financed In her name. She is now deceased. Will the bank let me refinance the loan to take over the loan ?

Please accept my condolences on the loss of your mother. The answer is maybe. If the bank thinks you meet their credit standards and that the car is worth more than your mother owed on it, and if you will become the owner of the car under your mother's Will, then they may let you refinance it. You might also be able to get a loan from another lender and buy the car out of the estate. Be very careful if you are the executor or administrator that you properly carry out all of the estate administration, however: if there is any equity in the car and your mother has other debts, then those other debts may need to be paid even if you have to sell the car (to yourself or someone else) to get access to the equity in the car. If you will be handling the estate, please consider having an attorney help guide you through the process.  

The executor or administrator can ask the bank about this.  Often the lender is more than willing to have someone who inherited the car take over the loan.