Bongo Fury

Hello my bongos leaking out of the rear diff where the prop shaft enters.

Does any one know where the best place to get one is or if there are any other parts that would fit, like of a B2500 Mazda pick up say.

Any help welcome cheers.

I think the seal is integral to the bearing,this may be a main dealer item i fear,unless anybody else knows of where to obtain one new?