Michael Lohan Graduated From Lindsay Lohan's Rehab Joint

Lindsay Lohan has history with the rehab center which she'll call home for 90 days -- her dad dried out there in the late '80s, and we're told he and the rehab owner are thick as thieves.

TMZ broke the story ... Lindsay will be moving into the Seafield Center at Westhampton Beach in New York for her court-ordered rehab. Turns out a coked-up and boozy Michael Lohan checked into the joint in 1989, and became tight with Executive Director Mark Epley.

Michael tells TMZ ... Mark knows the "family dynamic" of the Lohan family. Michael says the goal is to force Dina Lohan to agree to family therapy -- with Michael and Lindsay -- to deal with their laundry list of woes.

Here's the problem -- Michael got sober at Seafield, but he fell off the wagon pretty quickly thereafter.

Michael says he wanted Lindsay to go to Lukens Institute in Florida because the facility is small and stylized to the patients, but he still likes Seafield a lot.