car jerks before going into 1st gear. on 2001 Saturn SL2

after driving my car about 45 minutes or so and maybe every few days it jerks before going into first gear.I have had the transmission serviced 3 months ago but it still does the same thing every so often.What could be causing this problem?

Asked by for the 2001 Saturn SL2
There are many possibilities, and without experiencing the problem, it's hard to know what to suggest. I recommend you take a mechanic for a test drive and see what they recommend.