My caviler would not start this moring, the engine would turn over fir a few
seconds then there would only be a clicking noise, similar to a starter that
is not quite engaging.  I boosted it and it started right away.  I then went
out and got a new battery.  It seemed to do the trick.  However; the check
engine light came on later in the day, along with the ETS OFF light.  The
car seems to run well, the only thing that is not right is the car jerks
hard when shifting.  Could this mean that I need to add trans. fluid?  I
know that to do that I need to remove a plug on it and fill until it flows
out that hole.  Would the check engine light come on if there was low trans.
fluid?  Any advice is appreciated.

Thanks
Robert