Automatic transmission slipping
How to fix please
The most common reason for a slipping transmission is low fluid levels, so I would ask you, have you checked your transmission oil levels?
While I do not have details of your car, another issue can be broken or old transmission bands. Bands keep the gears together and worn out bands can create slipping problems.
Let me know if you have checked these
So I saw you drive a Honda Odyssey, a very reliable car. So I'm sure the problems you are facing are actually very small. Did you have a look at it?