For accuracy (not directed at you, more at guys like fly1 who have no idea of UM history).
Olivadotti was the DC under Howard. In that infamous first meeting that JJ had with all the UM assistants, Olivadotti was the jagoff who kept dropping his keys on the table, then picking them up, then dropping them again. Olivadotti quit, and then Bill Trout (DE Coach) was elevated to DC. Harold "Hal" Allen, who also coached the DL, had been at Miami for 19 or 20 years, and he was pretty much forced to retire from coaching and work for the Athletic Department in an administrative role. Mike Archer (DB coach) jumped to LSU, then was promoted to DC a year later, and eventually became the HC of LSU. Those are the 3 Schnellenberger assistants who did not become a part of JJ's first staff.
Butch was hired to replace Trout as the DL coach for the 1984 season. Mike Knoll coached LBs. I can't remember who coached DBs in 1984.
As for Bill Trout, yes, he was fired after the 1984 season. Paul Jette was our DC for 1985, and he was fired too. Wannstedt was hired as our DC for 1986.
Check out this deleted scene from The U documentary, it shows all the assistant coaches and their offices within Hecht:
Assistant to Head Coach - Bill Trout (also the DC)
Olivadotti and Soldinger - shared an office
Brodsky and Trestman - shared an office
Vagotis and Kehoe (GA in 83) - shared an office
Stevens and Alexander - shared an office
Allen and Maddox (GA in 83) - shared an office
(Archer must have quit by that time)
And the GREAT Norm Parsons was the Golf coach!!!