Engine mounts or tranmission mounts?

Recently i have experienced a few wierd issues with my car and all within 2 months period.
FIRST ISSUE:
The car started to hum when idle. If i stop at a red light i feel the car humming on and off. (hmmmm.....smooth....hmmmmm...smooth...)
dont know if this is due to spark plugs? or something electrical? it improved a little after i changed my engine oil.
SECOND ISSUE:
My car vibrates when i put it in gear and take off. more like when i am driving at a speed of 10-20mph i hear vibration on my dashboard and inside the car. once i catchup to normal speed it goes away.
dont know if issue one and issue 2 are due to the same problem.
dont know what the problem is...
could it be the engine mounts or transmission mount?
what is the difference in engine mount and transmission mount?
how can i tell the difference and identify what needs to be replaced. do both cause same vibration?
PLEASE HELP ME!

yes i dont know how to troubleshoot this and thats why i was asking for help...everyone does something for the first time in their life before they become experts....im very knowledgible on most of the stuff in the vehicle and wanted to get some help troubleshooting this but i guess im at the wrong place..but hey thanks for the advise!!!! so kind of you!

Recently i have experienced a few wierd issues with my car and all within 2 months period.
FIRST ISSUE:
The car started to hum when idle. If i stop at a red light i feel the car humming on and off. (hmmmm.....smooth....hmmmmm...smooth...)
dont know if this is due to spark plugs? or something electrical? it improved a little after i changed my engine oil.
SECOND ISSUE:
My car vibrates when i put it in gear and take off. more like when i am driving at a speed of 10-20mph i hear vibration on my dashboard and inside the car. once i catchup to normal speed it goes away.
dont know if issue one and issue 2 are due to the same problem.
dont know what the problem is...
could it be the engine mounts or transmission mount?
what is the difference in engine mount and transmission mount?
how can i tell the difference and identify what needs to be replaced. do both cause same vibration?
PLEASE HELP ME!
Last edited by homeofstone; Nov 30, 2013 at 12:15 AM.


