Gearbox and differential manuals Posted By donkiespeed in D8 GTO repair manual, D8 repair manual, S8, S8A, S8AT repair manual, Technical information September 7, 2015 Gearbox Check at least once per year the oil level of the T-9 or Borg Warner gearbox oil. Both gearboxes feature a oil level plug. At the T-9, it i...Continue Read