You're pretty much hosed in this case. As always, read the Wiki for more details.
As far as I know, you can't use Southwest vouchers or TTF's for travel on AirTran. That's your first problem. Second problem is that those funds are for two different passengers and can't be combined. For example, that $130 is probably $65 for you and $65 for your wife. Now, if you let each TTF expire, you could pay $75 for each TTF and have it reissued as a LUV voucher good for anyone to use. Problem is that none of your individual TTF's (even if you combined them) look to be more than $75...
Combining TTF's simply means booking a trip using multiple TTF balances then canceling that trip. See Wiki for more details.