looks like somebody already moused the ferrule. you can try getting it with a pair of slip jaw pliers, or pull the whole assembly down. some fluid will slop out so be ready on that.
the housing has two seals: an outer o-ring and an inner where the cable rides. you can find kits online with the search query: mopar speedometer gear housing seal kit.
note that the assembly is clocked and uses the tangs on the hold down tab to index as well as secure it.