You'll have to get under there and look for the leak. It could be either one.
seven
Syncromesh Transmission Fluid, you can only get it at the dealerships and it's about $15.00 a quart.
Check to see how low the fluid is on the dip stick. Add fluid in small amounts, about one fourth of a quart at a time. Keep checking the level until the transmission is full but not over full.
How many quart of transmission fluid is requier for a Chevy impala 2007
1 quart
Need to remove a quart of trans. fluid to add a quart of lucas trans conditioner. Does not have a drain plug.
About 1 quart
One quart.
It uses a special kind of transmission fluid that you can only get from the dealer. Cost about $14 per quart, but it is what you must use.
it only needs 1 Quart.
1 Quart.
You failed to mention what fluid you accidentally put in. In any case, have the transmission fluid flushed out and replaced with the proper ATF right away.