Battery Dying out making car clunk?

[eleer]

It seems that when ever my battery gets to that low point and I shift into
reverse it clunks really hard. I was wondering does anyone might know what
is draining the battery?

I have a 94 SL2 Automatic with 125,486 Miiles on it. I had the alternator
replaced last year and also did oil changes, automatic transmission fluild
change.

Does anyone have any ideas?

Thanks

 

[M. Butkus]

Check glove compartment, trunk light, something in cigarette lighter socket.
A bad ALT can have a bad diode and drain the battery. Only way to check is
a amp meter between the battery cable and battery. See how much of a drain.
The battery could be going. Had one on my wife's 300m die in 4 hours.

 

[Box134]

How old is your battery? Maybe it's dying of old age.

 

[Steve Barker]

I'm a wondering, what in the wide wide world of sports does the battery have
to do with a clunking when going into reverse????

 

[Philip Nasadowski]

I'm a wondering, what in the wide wide world of sports does the battery have
to do with a clunking when going into reverse????

Saturns have a wonky transmission setup. They rely on electronics to
shift and control the automagic tranny, and believe it or not, one of
the early signs of impending battery/alternator doom is in fact the
automatic transmission doing weird things. I have a manual so I never
experienced this, but pretty much the first thing after checking /
changing the fluids is to look into the charging system.

Problem being, reverse troubles are also a sign of impending
transmission doom