97-06 Jeep Wrangler TJ NP231 Extreme Short Shaft Kit TeraFlexThe TeraFlex TJ: NP231 Extreme Short Shaft Kit is what short wheelbase TJ Wrangler Unlimited owners have been dreaming about for decades. Not only does the Extreme Short Shaft Kit improve on strength, but it also increases driveshaft length by up to 7 Inch over a stock application. This kit is also more than 3 Inch shorter than a standard Slip Yoke Eliminator Kit and 1. 5 Inch shorter than an ATLAS II. Speedometer readings are transferred through a