'they' are mistaken.
'they' may be mistaking the fact that previous model 2000's from 63-64 DID have an option for a 5spd trans.
trans speeds are always referred to as forward and then reverse. or generically as forward gears only.
ie.. 8/2 10/2 6/4 or a 3 or 4 or 5 or 6 or 8 etc.