So I checked the fluids yesterday night. The oil consumption is about 3/16 inch (on the dipstick) for 300 miles. I guess that's normal.

Then I checked all the other fluids they are all ok except the AT tranny fluid.

It was 80f outside. I cleaned the tranny dipstick and inserted it back. Then pulled it out and checked the level. Surprisingly
it's way above the 65c full line. It was 2 or 3 inches above the F mark.

Last time the dealer added fluids so I've no idea what they did.

I know this is really stupid but do you think it's reasonable b/c I never know it can be that full. If that's real, does the overfill could possibly damage the tranny? Should I drain some fluid?

I tried couple times but received the same result.

 

Thanks a lot in advance

 

this should be posted in the tech garage.

But, I don't think overflow of tranny is a terrible issue. I know that it's more difficult to change on an auto. Have you noticed any trouble with the gears? Does it feel more sluggish?

 

Check the A/T fluid level WITH THE MOTOR RUNNING IN PARK.

Read your owner's manual.
Geez.....

 

+1
when transmission is not spinning, the oil will drain back to the pan and you will have a high reading.

 

Words to live by.