I'm running into numerous issues after having changed a transmission on a 84 300sd.

Firstly, there is this AWFUL vibration that feels like I have square rims or a flat tire. I had to disable the ebrake on the back left tire (drivers side) because it locked up. Yet I'm still having this problem. Its not a subtle vibration but a horrible "cars about to explode vibration" from approx 5 mpg to 40's.. then calms down at roughly 50. Tranny seems to shift fine and i'm not having any problems as far as that.

The transmission dipstick tube isn't down flush, and the fluid is "milky" because (i believe) the transmission is sucking air in. Since the bolt is nicked, i plan on applying epoxy for the problem and of course a flush. May this be the vibration issue i'm noticing?

The second issue is I had the air intake off and exhaust pipe off as well. After driving around to test the tranny, it suddenly got VERY loud. Like a truck on steroids loud. Why is this so? I noticed the oil got very low because it leaked out of where the air intake would be. I'm told by several people this isn't much of a problem, but I wanted to make sure.