Poor mixture control rich or weak (or misfire) Could be clogged air filter, theres a smal pipe on the throttle body that sometimes blocks up, Lambda (O2) sensor or wrong fuel
Example: a .50 caliber is 1/2 of an inch. Lets jus say a "1.00 caliber is a inch..44 = .44 of an inch or 44/100 of an inch
The Dana 44 has a bigger gear set than the Dana 35.
It will be stamped in the webbing "44". Goggle search identifying Dana axles and it will show you the location.
The number 44 does not seem to mean anything Biblically. It is twice 22, which represents 'light' if that is any help.