transmission shift problem

i have lumina 2000. runs great but the only problem it has sometimes after running for 15- 20 minutes it gives u a jerk while shifting gears. i have done tranny service but it didnt help . sometimes it does not do at all. if somebody can advise me on that.

Welcome to AF. This may or may not be a trans problem. Either way it should be scanned with a trans function scanner to look at the PCS activity, which was somewhat troublesome in this trans and could cause harsh shifts.

i have lumina 2000. runs great but the only problem it has sometimes after running for 15- 20 minutes it gives u a jerk while shifting gears. i have done tranny service but it didnt help . sometimes it does not do at all. if somebody can advise me on that.

yesterday i ran it for abt 50 miles it ran smooth all the way. no shift problems .
could it be tune up thing.

I have a 2000 lumina that does the same thing if I find anything thats wrong with it i'll let you know