Owners on user forums who installed a full heavy-duty Power Stop brake kit on both a GX470 and a GX460 report strong results. This Power Stop Z36 Truck & Tow rear kit, MPN K5875-36, is sold for the rear axle of the 2010 to 2019 Lexus GX460. Forum owners who stayed with the factory setup often call it underwhelming: the OEM brakes are pretty poor. One ClubLexus member said they've made a huge difference on both his GXs and others.
Paying more than for generic rear pads makes sense for owners who tow, carry heavy loads, or descend long grades, which is the use the Truck & Tow designation points to. Owner reports are not unanimous, though. Some buyers on forums have been seeing mixed reviews, so compare the kit against your own driving before ordering. Owners describe the front-and-rear sibling kit, K5874-36, as Carbon Fiber Ceramic Brake Pads and Drilled/Slotted Brake Rotors; confirm the exact pad compound and rotor style included with K5875-36 with the manufacturer.
Owners on user forums rate a GX460 rear pad and rotor job as super easy, but the rear rotor has parking brake shoes behind it. Follow the right procedure with the star wheel on the rear axle to get the rotor to come off. Backing off the shoes first matters, because if you bash it with a hammer without taking the tension off the shoes, you could end up having to redo the parking brake also. Owners advise using a plastic dead-blow hammer if necessary, and replacing the rotors rather than resurfacing them is the approach they recommend. Check torque specs against the manufacturer's installation instructions.
