Would a bad tourque converter cause shaking during driving when gas is applied and run smooth when put in neutral while moving?? 2000 durango 5.9l

 

Everything could be a possibility.
Even in nuetral your torque conv. is still spinning.
But under load the issue i think would pertain more to the drivetrain as in Driveshaft/tires/bjs.
I'd first have someone look into the driveshaft (missing/broke) c-clip on a joint etc.

 

a yoke bearing or U-joint.

 

Does it happen at a specific speed,rpm,and does it do it with the overdrive on or off?