The BJP leader was speaking at a function in suburban Dadar, where he along with Sena Executive President Uddhav Thackeray released MP Sanjay Raut's book "Yugant", a compilation of his articles written on the 86-year-old leader.
Gadkari said Thackeray took decisions which he felt were "right and reasonable".
"He was the only leader who thought on technical issues. Whenever we approached him with an issue, he would listen to us and co-operate on those he felt were right," he added.