Quote:

two speed differentials always seemed like
a better way than overdrives to me,
and can be 4 to 8% less friction,
but designing one that does not have too much unsprung weight is certainly a problem on a live axle.

there was a short lived two speed Dana 60 on Mercury Cougars years ago




A two speed Dana 60 is a fascinating idea. Wouldn't matter what transmission your using.

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