2000 Saturn SL1 banging noise

2000 SATURN SL1
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LLOYD ALCON
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Transmission problem
2000 Saturn SL1 4 cyl Front Wheel Drive Automatic

I live in vt. cold weather climate, etc. the trans. is making a banging noise when it changes gears its a pretty hard bang. When it reaches the last gear it runs fine, no noise, no lose of power. Even when i slow down there is no banging noise. The noise only happens when I start driving. It started today on the way home from an errand and i have not driven the car anymore. Also there are no warning lights coming on at all. thanks so much. Lloyd
Jan 10, 2010 at 4:38 PM
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SATURNTECH9
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Well usually when u get a hard shift in every gear it's too high of line pressure in the transmission.u probably ethier have a bad line pressure actuator or wiring going to it.the most likely cause is probably a line pressure regulator which is located in ur valve body.the best thing to do is have it checked out by a professionial I really can't tell u how to diagnose it on This site it takes special tools a transmission pressure gauge scan tool that can buzz the actuators and command the pressures for the step pressure check also air check the clutchs all that.also u should have the alternator tested sometimes they go bad and cause the transmission to shift poorly.let me know what u find.
Jan 10, 2010 at 9:56 PM