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supereal · 03-16-2022, 04:18 PM

I put a Ryan overdrive in my '47 convertible. It mounts on the front of the rear axle. It gives me a 30% reduction when engaged. I don't believe Ryan is still in business, but Mitchell is. Like my unit, it is controlled by a knob or lever and a cable. The Borg-Warner unit will require extensive modification to the driveline, together with wiring for the kick down, relay, and solenoid. My car has a 3:78 axle, and most B-W units use different ratios for different applications. I really enjoy being able to run with traffic on the highways. I suggest you sell your B-W unit and go for the Mitchell, which will bolt in your car.

03-16-2022, 04:18 PM	#2
supereal Senior Member Join Date: Jul 2014 Location: Iowa Posts: 1,634	Re: overdrive? I put a Ryan overdrive in my '47 convertible. It mounts on the front of the rear axle. It gives me a 30% reduction when engaged. I don't believe Ryan is still in business, but Mitchell is. Like my unit, it is controlled by a knob or lever and a cable. The Borg-Warner unit will require extensive modification to the driveline, together with wiring for the kick down, relay, and solenoid. My car has a 3:78 axle, and most B-W units use different ratios for different applications. I really enjoy being able to run with traffic on the highways. I suggest you sell your B-W unit and go for the Mitchell, which will bolt in your car.