Big Bang Theory, Why is the nose of my Diff pointing straight down...

'66 mustang fastback ... Nothing special ... 289 4 speed ... Illicit public street activity on a desserted desert rd ... Grabbed 2nd gear at the propper shift point ... Spring perches released from the housing ... Pinion shaft yoke proceeded to eat a hole in the floor ... We managed to horse the pumpkin to a more level attitude and drug it back to town ... Probably welded the perches on the rearend on the Friday before Memorial Day ... Happy Memorial Day!