Question: what is a tj vs jk?
Answer: The only notable difference is the obvious change in width. The axles under the TJ Wrangler are 61″ wide flange to flange. Where as the axles under a JK wrangler are about 65″ wide flange to flange. One other difference between the two is that the TJ D44's have air lockers, and the JK D44's have E-lockers.