Why does my car jerk when i change the transmission from park to drive

Ok.If idle are low and engine stall sometime and power and acceleration is ok pls forget about fuel filter. First you need to check air filter for heavy clogging and if it is ok,then clean inner butterfly of throttle body with WD40 for example.Then you probably will get a little high RPM.To solve this "Idle air volume learning" procedure must be done either with scan tool or manually.If it doesn't solve the problem please send me output signal voltage from MAFS (air flow sensor) Ok.If idle are low and engine stall sometime and power and acceleration is ok pls forget about fuel filter. First you need to check air filter for heavy clogging and if it is ok,then clean inner butterfly of throttle body with WD40 for example.Then you probably will get a little high RPM.To solve this "Idle air volume learning" procedure must be done either with scan tool or manually.If it doesn't solve the problem please send me output signal voltage from MAFS (air flow sensor)

on some newer cars its electric , shifted from PRNDL to TCM and from TCM to solenoids before ever becoming mechanical, 50 years, as ET and Controls.... on some newer cars its electric , shifted from PRNDL to TCM and from TCM to solenoids before ever becoming mechanical, 50 years, as ET and Controls....

now the why, the answer is, beause the engine idle RPM is out of control,,, 99% of posters here post this , and do not even notice ENGINE RPM is too high,or fail to say it does this hot , cold or both (engine temps), do post back the RPM and temp. (and if there is a delay before the engine loads down from PN to drive. try anothe car, take note of normal delay, now yours...?????? A/T tranny is complex with over 50 possilble squacks. (slips, late shiifts, on and on) now the why, the answer is, beause the engine idle RPM is out of control,,, 99% of posters here post this , and do not even notice ENGINE RPM is too high,or fail to say it does this hot , cold or both (engine temps), do post back the RPM and temp. (and if there is a delay before the engine loads down from PN to drive. try anothe car, take note of normal delay, now yours...?????? A/T tranny is complex with over 50 possilble squacks. (slips, late shiifts, on and on)