because it is no longer a tight seal
Yes it is, you have to get it looked at ASAP.
Shouldn't have to add any unless you have a leak in the system.
Coolant should not be leaking from your transmission the only fluid in your transmission is transmission fluid. A faulty transmission seal can allow transmission fluid to leak out.
Transmission fluid can leak from many places. It could leak from the actual transmission itself, or any of the tubing that goes from the transmission to other parts of the car.
You can locate the transmission fluid leak on your 2001 Chevy Metro by looking at the transmission fluid on the ground. Look above the transmission fluid stain and you should be able to see the source of the leak.
No, brake fluid will not fix a transmission leak. Brake fluid is specifically formulated for hydraulic brake systems and does not possess the properties needed to seal or repair transmission issues. Using brake fluid in a transmission can cause further damage. It's important to use the appropriate transmission fluid and seek professional help for a transmission leak.
Check fluid level in transmission
An oil leak on a 1995 Toyota 4Runner can often be repaired by replacing the damaged gasket or seal. Tightening the oil pan bolts can also fix some leaks.
transmission cooler
The transmission will not work without fluid.
Why does a 93 dodge dynasty leak transmission fluid?
transmission leak in reverse only