Confusion does happen on forums, Ralph.
Use the link below. Fill in the form. Tell them that you do not remember any details about joining Red Square in the past but you definitely want to belong to the forum. Ask them to help you by providing your old screen name and giving you a temporary password so you can log onto the site. In the alternative, they could cancel your old screen name and allow you to submit a new application to join using a different screen name and password.
Most sites prohibit members from having multiple identities (screen names) and I think that's what's going on here. Work with them to get it sorted out because you need that site. Perhaps, if you have been using just one screen name everywhere, then it just a matter of them giving you the temporary password.
If there is a filter close to the trans-axle, then that is for the trans-axle and is a good thing to have. Try and find the brand and model number of the filter so you can purchase another one. There should be a tag on the trans-axle that identifies who made it along with the model and serial number. Once you have that info, you can go to their website and find out the correct oil to use so you can drain out the old, install a new filter and refill the hydro with the proper oil.
Some hydro's use ATF while others use 20W50 motor oil.