Definitely get the charging system checked first. The transmission is
shifted by electric valves (not sure about your '92 though.) and if you
don't have good power, all bets are off. There have been many posts here
about all manner of strange things happening that eventually trace back to
the battery or alternator.

"Mook" > wrote in message
oups.com...
> My automatic 92 Saturn had the "Shift to D2" light go on a few days
> ago. Then the transmission started acting funny. While in "Drive" it
> would accelerate very slowly as if starting from a high gear. When
> shifting from "drive" to D3, D2 or reverse, the whole car would jump as
> if the motor mounts are totally loose. As soon as I accelerated to
> 30MPH the "Shift to D2" Light would go off. After a day with this going
> on the battery died just as I was pulling up to my driveway. I
> replaced the battery and the car drove fine for one day. Now the same
> problem started again. The "shift to D2" light is on, and the
> transmission is acting funny again. What is going on?
>
> 1. What does transmission have to do with electrical power? I thought
> it is purely mechanical.
> 2. I am thinking the problem might be that the Alternator is bad. But
> I can't explain why the transmission is acting the way it is, and why
> the "Battery Low" light did not go on.
> Any insight on this problem would be greatly appreciated.
>
> Thanks
>