Conversation so far:
What year to Gramm leave?
1987.
Why did he go?
Gramm each put out solo efforts on Atlantic.
What work was done solo?
Ready or Not.
what year was this?
January 1987.
did they do any other solo work?
Gramm followed with his second solo release, Long Hard Look.
what year was that?
October 1989.

Question: Did he ever reunite with the band?
Self-contained rewrite: Did Lou Gramm ever reunite with the band Foreigner?