I have Nissan Titan SE that doesn’t have a locking differential, even though it comes as an option. Is there a way to make a non-locking dif into a locking dif by adding a button and hooking up something inside? Or would the whole rear axle need to be replaced to accomodate one that does lock?
Yep, there are conversion kits. ARB is maybe the best company for that. Their website is http://www.arbusa.com/