'09 Altima Shaking - Tried Everything

[cdurrs]

My 2009 Altima shakes in P, R and D. Moving or not. It seems to shake just slightly less in N, where as R and D give the most vibration.

I've read through forums for months and done every recommended repair for the shaking problem. The shaking seems to increase when the a/c is on, but regardless the shaking is way too much to begin with.

-Alternator
-Belt & Tension Pulley
-Spark plugs (put in Denso not NGKs)
-All motor mounts

And it still shakes regardless of moving or not. Would the Denso sparks really cause this over NGKs? What else can I do to solve this annoying problem? This is running me up the wall!!! Could it be something as simple as a vacuum leak? Could it be a rough/seizing pulley off the belt drive (possibly the a/c)?

I started putting in synthetic about 6 months ago and change it well before the recommended km. Did the water pump a few months ago as well not that either of those would have anything to do with the shaking.

Please help! I'm going bat s*** crazy and she might just get a bat taken to her soon.

[seldomseen]

It's most likely time you take your car to an experienced mechanic or the Nissan dealership. The problem you're describing can be due to a multitude of issues, both simple and complex. Your car really needs to be on a lift, coded, and physically examined to isolate, and diagnose the problem.

[Robs 08 Altima]

It's most likely time you take your car to an experienced mechanic or the Nissan dealership. The problem you're describing can be due to a multitude of issues, both simple and complex. Your car really needs to be on a lift, coded, and physically examined to isolate, and diagnose the problem.

With an issue like that I would have gone to the dealer to begin with instead of flushing money down the toilet guessing at what the problem was. That's just me though.

[cdurrs]

I am not a smart man. Will report back after mechanic takes all my money.