My wife and i are now divorced she signed the papers and gave me the house but she is still on the mortage does it do me any good to have her sign a

Unless and until the deed is signed over, your wife is still a co-owner (tenant in common) with respect to the house and will still have certain rights, irrespective of what the divorce papers may say.  Any borrower or prospective seller will not know what happened in the divorce action.  They will only know what is recorded on the property records.  You must have her sign a deed.