The first thing I would do is contact the bank and find out if indeed you were a co-signer, or a co-applicant. Depending on the bank, and the type of loan you took out, that may have bearing on what needs to be done to the loan. Many banks used to allow you to have the loan modified, as long as the remaining spouse was able to qualify on their own. This would mean that your ex would need to approve of the request, then qualify after income verification and credit background check.
However, every bank is different, and lending has changed in recent years. I would start by calling and talking to a loan representative, or if a smaller local bank, stopping in their offices.
If all else fails, have your attorney that handled the divorce send a letter to the bank making the request.
Howard "Bucky" Buchanan, SFR
Office: 908-735-2552 x208