I suspect this might be impossible. Our Patrol (2010 ST 3.0L Diesel) has so far been a great tow vehicle. The original springs but with Koni shocks give a firm ride with a lot of shake and shudders on our pathetically maintained bitumen country roads - particularly with the van on the back. I run 36psi front, 38 psi rear in Yokohama Geolander ATs. It was always something we could accommodate, indeed it was part of the adventure.

But now my wife has had two hips replaced in the last year and suffers from a bad back. Every bump gives her pain. We can only manage very short drives. I've got to find a way to provide more comfortable travel. Either we make the suspension more compliant to soak up road irregularities or I swap the Patrol for different tow vehicle.

Is there something I can do to improve the ride quality?