Ryan Overdrive
I have run a Ryan OD in my '47 convertible since they first appeared. It has been trouble free. I use a cable to shift it instead of the supplied lever. When in OD, it is noisy, sounding like an old Ford truck, but the wind noise in an open car hides it. The rear end is a 3-78, and the OD is 33%. I use it only on the highway, as it is a bit tall below 35-40 mph. I understand it is no longer made. Too bad, as it is a rugged unit.
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