Yes, that is the brake master cylinder. Now you have a new problem. You need to totally remove the trans fluid from the brake system. It will damage components and cause brake failure. Listen, at this point the system needs to be totally flushed and the proper brake fluid replaced. As far as the rubber gaskets, they may be swelled as a result of the trans fluid being in the system. The brake system should then be inspected by a certified tech.
As far as the transmission, the dipstick is on the transmission. It should be under the battery area. Check the fluid when the engine is hot and running in park. If you need to add, make sure you have the correct fluid and using a funnel, add (if needed) through the dipstick tube.
Let me know if you have questions.
Thursday, April 10th, 2014 AT 8:48 AM