i had not heard about that Hone overdrive.
interesting

there was a Dana 60 two speed in the 1970s.

i saw a picture of the underside of a Cougar ( maybe 1976?) and eventually telephoned Dana Spicer
who gave me a number for an engineer who worked on the project.
he said 17,000 had been manufactured but very few sold.
i searched online junkyards but could never find one.

a coal company i worked for had a French built Mack Midliner parts truck that went over a million miles, travelling 250+ miles per day, five or more days per week.
it had a two speed rear diff that proved reliable.

for the the money i have spent at dealerships having a 9.25 rebuilt,
i could have bought a Winters Quickchange diff
and had a NC race shop install it,
and at least been able to run experiments finding:
what ratio gives the best 0-60 acceleration,
and what other ratio gives the best MPG at a steady 70 mph.