The car vibrates when in drive while at a stop. What would cause this ?

Thank you Archaeology. How can I check /test the transmission/motor mounts to find which are bad if any ? Thank you Archaeology. How can I check /test the transmission/motor mounts to find which are bad if any ?

Checking motor mounts/transmission mounts is a matter of jacking the car up (onto at least two jack stands), putting down a sheet of cardboard to lie upon, sliding yourself under the car, and using your brightest utility light or flashlight, look for and feel for any/all connections between the engine and the frame for motor mounts, and any/all connections between the transmission and frame for transmission mounts.
Sometimes you can see half of a motor mount from looking down into an engine, and then visualize the other half of the motor mount from below.
Replacing these is easier than one might think - you jack up the engine or transmission (really just support it with a hydraulic jack using a wood scrap 2x4 as a protective pad between the jack and engine or transmission), unbolt the offending support, slide it out, slide in & bolt down the new support - then lower the engine/****** onto the new support. Checking motor mounts/transmission mounts is a matter of jacking the car up (onto at least two jack stands), putting down a sheet of cardboard to lie upon, sliding yourself under the car, and using your brightest utility light or flashlight, look for and feel for any/all connections between the engine and the frame for motor mounts, and any/all connections between the transmission and frame for transmission mounts. Sometimes you can see half of a motor mount from looking down into an engine, and then visualize the other half of the motor mount from below. Replacing these is easier than one might think - you jack up the engine or transmission (really just support it with a hydraulic jack using a wood scrap 2x4 as a protective pad between the jack and engine or transmission), unbolt the offending support, slide it out, slide in & bolt down the new support - then lower the engine/****** onto the new support.

Hi Archaeology . Sorry, I should have been clearer. I do know how to find and replace the motor mounts and transmission mounts on my car. I dont know how to tell if they are bad or not. How do you tell ? Hi Archaeology . Sorry, I should have been clearer. I do know how to find and replace the motor mounts and transmission mounts on my car. I dont know how to tell if they are bad or not. How do you tell ?

To check on the integrity of a motor/transmission mount, I jack up the vehicle, get it even on two jack stands, start up the car and look/listen/feel each mount. If its making audible noise or vibrating too much or actually looks like it has seen better days when the engine is idling, then it makes my to-do list. If it's difficult to tell where the noise is coming from, I'll use a mechanic's stethoscope (a modest-cost unit can be had at Harbor Frieght Tools,http://www.harborfreight.com), which screens out sounds coming from parts other than the part being touched by the end of the stethoscope. If you have one of these tools, the first thing to auscultate (listen to) is the clicking of all your fuel injectors - getting to know what they sound like when they're operating perfectly at idle allows one to quickly and easily eliminate this possible cause of performance issues. To check on the integrity of a motor/transmission mount, I jack up the vehicle, get it even on two jack stands, start up the car and look/listen/feel each mount. If its making audible noise or vibrating too much or actually looks like it has seen better days when the engine is idling, then it makes my to-do list. If it's difficult to tell where the noise is coming from, I'll use a mechanic's stethoscope (a modest-cost unit can be had at Harbor Frieght Tools, http://www.harborfreight.com), which screens out sounds coming from parts other than the part being touched by the end of the stethoscope. If you have one of these tools, the first thing to auscultate (listen to) is the clicking of all your fuel injectors - getting to know what they sound like when they're operating perfectly at idle allows one to quickly and easily eliminate this possible cause of performance issues.