Why does my car jerk at times at 40 and 60 miles hr on 1995 Toyota Tercel

I have a 4 cylinder automatic that will jerk hard at times when accelerating at 40 and 60 -65 miles hr I have replaced all belts and sensors within 2 years could this be transmission or another issue ?

by in Louisville, KY on December 03, 2012
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2 answers
ANSWER by , December 04, 2012
My guess= engine misfire. How long since last tune up spark plugs ect.? Possible coil or plug boot breaking down, there are four. One each per cylinder.
ANSWER by , December 04, 2012
do you have a ck eng light on?