7 quarts is too much; almost as if someone checked the fluid level with the motor not running and added fluid when not needed. I would not put 7 quarts back in without being able to measure the level after putting 5 qts in.
There is a youtube video that shows how to use the oil dipstick and mark it for use for measuring the trans fluid level. Not too difficult as long as you pay attention to the trans fluid temperature.
There is a youtube video that shows how to use the oil dipstick and mark it for use for measuring the trans fluid level. Not too difficult as long as you pay attention to the trans fluid temperature.