i changed my diff fluid today. everything went smooth until it was time to put the new fluid in. the pump i was using wasnt sucking the fluid out of the bottle right or it had air in it somehow, or maybe the fluid was too thick for the lines, but anyhow, i had 2 quarts of royal purple max gear oil and some of it got spilled on the ground, some on me, some im not sure if it got pumped in right blah blah blah. how do you know or how can you tell if your fluid is at the right level? what can happen if there is too little fluid in there? i mean, both the bottles are in my trash can empty, so most of the fluid had to go in somehow, but im just really uneasy about it because that part didnt go smooth at all. how can i check if the fluid is at the right level? thanks for the help!