I bought this 2014 Rubicon about 5 years ago that had a AGR hydro assist system installed. I never liked it, always found it very twitchy and the "feel" of the road was super light. I just installed a PSC steering big bore gearbox in my JK and wow what a difference in the handling and stability of my jeep now. It has transformed my jeep, all the twitchyness is gone and the "feel" of the wheel has more resistance to it like it had when it was stock. I really love it but it has only one issue, since installing the PSC gearbox my jeep now drifts towards the center line if I let go of the wheel. My jeep always tracked straight with the old gearbox and I didn't change anything on the jeep except change the steering box and adjusted the drag link to center the wheel. IS this a port balancing issue? Any thoughts what could it be?

 

You probably need to align it. If you didn’t get the pitman arm in the right place, it could do that.

 

Sry I forgot to mention the alignment was done 3 months ago when I put on new tires and the pitman arm is on properly because it is keyed and can only go on the sector shaft in certain spots and putting it in the wrong spot would definitely be obvious. The steering box was also properly centered using the factory scribed marker on the shaft and case, but regardless of all that, I have have an after market one ton steering system which has flipped knuckles. The draglink is connected directly to the knuckle therefore there is no way that that I changed the toe, camber and caster by just changing the steering box.

 

The drag link likely needs to be adjusted as well. You have a new pitman arm on the new box and it’s probably not putting the drag link in the same place as before.

edit, just re read that you adjusted the drag link.

when it drifts, is your steering wheel turning as well or does your steering wheel stay straight? If your steering wheel turns as well maybe there’s something wrong internally with the box sending pressure to the ram and forcing a slight turn?