My camry starts shaking when i turn the ac on and the car is on drive

Transmission

AC compressor put load on engine causing engine shake vibrate.but check make sure AC compressor mounting bolts tight and drive belt correct tension.now if AC compressor very old most time bad compressor cause more load on engine causing shaking real bad.

Check the exhaust system and see if the catalytic converters are pluged up .

you need an alignment.

You need to test the computer control module of the engine for fault codes, to do that go here and learn how.

https://youtu.be/1ZRjcJOSFW0.


Here's your answer it was driving me crazy and I found this

my 2000 camry also shakes when idling. Looks like the radiator fan is culprit, but havent had time to change out yet. looks like old blades on fan broke off making it unbalanced when spinning to cool off causing excessive shaking. When driving its cool enough where that particular fan motor does not need to spin, therefore no shaking. possible solution is replace the fan that is wobbling.

Start by having the code pulled for the check engine light and go from there.

ck the a/c compressor or the belt tensioner. Does the a/c cool ok?

The problem is in the transmission Overdrive gears. You need to have the transmission checked and probably serviced. It may be a simple adjustment or Fluid and Filter change. I do not recommend you all them to use a synthetic replacement however as most of the time I have seen this done the transmission burns within about 6 months.