Thinking on it now, were the 40k boxes not all hy-tran instead of gear oil?
Nah. Our 1056 was 30K with hytan pressure lubed syncro with long sticks. We had a black and red CaseIH 856 about 18 months after. She was 30K syncro with long sticks but had 90 gear oil.
Don't know quite what the theory was with them.