I fixed 2 of my 8 tracks earlier
1) THE REAL DONOVAN - The tape let go on 1 end of the foil.. Luckily it was still at the edge so I just opened the cartridge and glued the foil pad to the tape...
2) JAMES TAYLORS GREATEST HITS - I put this into a different cartridge that thankfully plays fine.. (The one it was in did not)