I also have a rotor warping issue. I don't tow, but live on a long hill. 70% front 30% rear. I've been having rotor warping for years. A mechanic said warped again and it's less than year since changing calipers and milling the rotors. The mechanic said it must be rear drum/shoe adjustments. Tacoma rotor and caliper will solve the problem? Seems like it's more than an adjustment.