do you still have the torque tube arrangement? if yes, the trans is the same as original, if no, then there's no connection between the trans and rear .... you can track down info here, even if not for your exact year
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics