What traction bars are you running?
I understand that PMF is supposed to be good too?!One Up Offroad. They are the only ones which won't have any negative effect on suspension movement. Many different mounting options.
Good to know, have you heard anything about bds recoil traction bar system? Supposed to be like a motorcycle front fork in escence...anyone try them yet?PMF use a solid connection on both ends, meaning they don't compensate for the non-radial movement of the axle during the leaf's compression or extension. They do offer a linkage design, but I would not use that type (been there done that with another brand, but same design).
OUO uses poly bushings on the forward end to deal with the change of distance during suspension movement.