Outgoing Lt. Gov. Bob Duffy plans to give his successor on the Democratic ticket an orthopedic car seat as she travels the state.

Joking aside, Duffy advised Kathy Hochul, the former congresswoman who hopes to succeed Duffy as lieutenant governor, to be an advocate for Gov. Andrew Cuomo and be loyal.

“I said from the day I was sworn in, my job is to serve the governor,” Duffy told reporters after a farewell speech at the Democratic convention in Suffolk County. “I never used this position for my political future. Be loyal, work hard and serve the people of this state. She’ll be a great candidate, she’ll be a great lieutenant governor.”

Indeed, those are descriptions that could apply to Duffy, who traveled the state heavily promoting Cuomo’s agenda. The travel was so much for Duffy that he developed back pains — hence the need for the orthopedic car seat.

With the Hochul choice, Cuomo is once again turning to a western New Yorker as his running mate.

Four years ago, Duffy, then the mayor of Rochester, was selected to be Cuomo’s number two on the ticket, providing geographic balance at the expense of gender and racial diversity.

Cuomo lost western New York counties in 2010 to Buffalo businessman Carl Paladino and has since lavished attention on the area as governor.

Duffy says the nod to upstate is important for the ticket.

“Sometimes the farther out you go from New York City and the metro area, the more people feel a little bit left out of the process,” he said.

Hochul’s pick comes after speculation at the convention ranged on whether Cuomo would pick a Latino or African-American candidate. Republican gubernatorial hopeful Rob Astorino settled on Chemung County Sheriff Chris Moss, the first African-American to run as a Republican statewide.

Cuomo was rumored to be considering Secretary of State Casear Perales as well as Buffalo Mayor Byron Brown.

Duffy acknowledged his own selection four years ago bothered in the minority community, but added it was Cuomo’s choice ultimately.

“I’m sure that when I was selected to join him there were not a lot of people who were happy at the time,” he said. “That was just human nature for whoever would have been picked at that time.”