I found some quotes from SACH:
Page 106: “’Punish him [a child] with the rod and save his soul from death’ (Proverbs 23:14). Your children’s souls are in danger of death—spiritual death. Your task is to rescue your children from death. Faithful and timely use of the rod is the means of rescue.”
Page 151 “Remove his drawers so that the spanking is not lost in the padding of his pants.”
Page 152: "On some occasions we have had to say to our children, ‘Dear, Daddy has spanked you, but you are not sweet enough yet. We are going to have to go back upstairs for another spanking.'”
Page 154 “Rebellion can be something as simple as an infant struggling against a diaper change or stiffening his body when you want him to sit on your lap. The discipline procedure is the same as laid out above."
FTR, I don't think he's a monster, and I don't think he's as awful as Pearl. But I do think he is wrong and, moreover, he is advising parents to do wrong and damaging things to their children in the name of Jesus and salvation.
I'm also very glad to hear he has a new book that is very different from his old teachings. The only Tripp book in my library is his former one, and that's what most people are familiar with. I do hope that he has changed his heart and his teachings.