97 lxi tranny

my girlfriends car has been having a problem lately. when she backs the car out of her spot and puts it in drive the car will hesitate a bit when she gives it gas, then all of a sudden drive will engage. it only does this on takeoffs and it happens only once or twice then runs fine. does it have anything to do with the fluid warming up or something? the other thing i noticed, is that it tends to do it on mornings that its around or below freezing. any help would be great.

hi don't know if you every got your tranny fix or it got worse, but there's two mag switches on the trans. they send and recieve info from the trans. to the cpu the'er each about $25, you want the out- put switch, i've been there and done it, quite a few times, good luck