In Reply to: Low mileage and transmissions. posted by Bruce(OR) on October 21, 2018 at 12:28:51:
Transmissioin fluid changes were indeed specified in owners manuals in the 50s, 60s, etc., however many owners did not follow the recommendations. Automatic transmissions of the era (not the 50s) also had replaceable filters (inside the pan) that were also specified to be changed.
Sperm Whale oil was used in posi traction oil until outlawed by treaty. This is when the so-called limited slip differentials started causing lots of lock up related issues.