Overview Reviews Product Description The TeraFlex TJ / YJ / XJ: NP231 Short Shaft Kit increases the rear driveshaft length by 4" eliminating the need for a Transfer Case Lowering Kit in most cases. Also includes a larger output bearing and rear housing. Product Videos Custom Field Product Reviews Write a Review Write a Review × TeraFlex Teraflex NP231 Short Shaft Kit for TJ / YJ / XJ Wrangler Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *