San Francisco 49ers coach Jim Harbaugh said Friday that new Chicago Bears coach Marc Trestman "taught me everything" when they were on the Oakland Raiders coaching staff, and he still uses many of Trestman's techniques.

"Everything wouldn't be an overstatement," Harbaugh said Friday on "The Waddle & Silvy Show" on ESPN Chicago 1000. "We use his system still of calling plays and the way he taught us those concepts and techniques. I've used (those) since I coached with the Raiders, the University of San Diego, Stanford and the 49ers.

"He will do great and talk about long overdue. Marc Trestman becoming a head coach is well deserved, he will do a phenomenal job."

Harbaugh's first NFL coaching job came as quality control coach for the offense with the Oakland Raiders in 2002, and he reported directly to Trestman, the offensive coordinator. Harbaugh, a former Bears quarterback, went on to head-coaching jobs in college at San Diego and Stanford before landing the 49ers job in 2011.

Harbaugh took the Niners to the NFC Championship Game in his first season and led them to the Super Bowl last season, losing to brother John Harbaugh's Baltimore Ravens.

Asked if the Bears hit a home run with their hire of Trestman, Harbaugh said: "Absolutely. Grand slam. That was a grand slam hire. You see the coaches that Marc has put around him, they know football. He knows football. He's a great teacher and I think that's coaching right there. ...

"That's something I learned working with Marc, by example and by things that he would tell me. That's one of my lucky breaks in coaching was to work with Marc Trestman because he took the time to train me and to teach me. And I will always be thankful for that."