Built on, and inspired by, a long military tradition, the Jeep CJ5 is perhaps one of the most ubiquitous American vehicles ever made. Model production spanned three decades, and it would be no surprise if the lifespan of each CJ5 could also have lasted as long. Many different engine, transmission, and differential & axle combinations were offered in the over 600,000 units produced in those 25+ years. Even with all the different options available, most Jeep CJ5 parts are interchangeable across many different years. Given its initial military application, the spartan and austere design was absolutely necessary. Fun fact: doors were optional.