Big Bore XD2 Cylinder Assist Steering Gearbox for 2007-2018 Jeep JK
Big Bore steering box for tires over 37″
The BIG BORE XD2 is the most powerful and strongest replacement steering gearbox on the market for the Jeep JK. Any Jeep JK with larger tires and/or locking front differential needs this bolt-on upgrade. The BIG BORE XD2, when combined with our PK1858 XD Pump Kit, provides up to 35% more turning power over the OEM steering gearbox.
The sector shaft diameter has been increased from 35MM to 45MM to handle the extra torque output and prevent shear in extreme duty environments. Every Big Bore XD2 Steering Gearbox includes a NEW proprietary Pitman arm designed for the larger sector shaft.
Improved on-the-road driving characteristics are achieved by using a 16:1 ratio 85MM piston assembly. Also, the much larger 85MM piston assembly delivers significantly increased torque output. This increased torque output will turn up to 37″ tall tires without the installation of cylinder assist.
This steering box is prepared for an optional additional hydraulic ram.