Diff Pinion Oil Seal (Type 1)

This is the oil seal for the REAR diff pinion (the main oil seal where the propshaft connect to the differential).

It also fits the FRONT on later models 

This is the genuine special 40x72x10 oil seal with additional lip, you must check the size as a Type 2 could be needed instead if you are looking at the FRONT diff on an early Jimny