[ImperialCrown]

First see if you can duplicate what happened and note what was or wasn't happening when the 'stall' occurred.
Transaxles rarely cause a stall.
There isn't enough information here to even really venture a good guess, but engine stalls are usually from fuel or ignition system problems.

 

[GottaPT]

just talked to the hubby. he says it revved up and revved down when he was coming out to get me, down hill. That's why he's panicked.

 

[Bob Lincoln]

First step, check fault codes:

http://www.allpar.com/fix/codes/index.html