If I understand correctly the 55,6 rearend has no drain plug on the bottom of the rear end housing.
The rear end on the 56 has a drain plug.I ran the #s (GM 14,3725899)on it and it comes up as a 1957 non-posi stock rearend.
The rear springs appear new also although the rubber bushings for the springs are pretty rough.
Keeping in mind that the 56 has been passed around and around for probably the last 20 years,maybe one of the POs had a 57 rearend layin around & used it because the original was junk. OR is the 57 rearend superior to the 56?
The rear end on the 56 has a drain plug.I ran the #s (GM 14,3725899)on it and it comes up as a 1957 non-posi stock rearend.
The rear springs appear new also although the rubber bushings for the springs are pretty rough.
Keeping in mind that the 56 has been passed around and around for probably the last 20 years,maybe one of the POs had a 57 rearend layin around & used it because the original was junk. OR is the 57 rearend superior to the 56?
