http://www.high-impact.net/transmission_and_gear/rangeroverdrive.htm
"Ranger Gear Splitter", an OD to go in front.

http://www.advanceadapters.com/products/pn-760001m-27/
I believe this is the same thing from Advance Adapters, they call it a "Ranger Torque Splitter" Like the other folks they have a few different models to match your needs.

Or Gear vendors sells an OD to go behind.
http://www.gearvendors.com/

And there was a similar but different one from US gear, don't see them on the website and from what I've heard about them I wouldn't go hunting one either.

Finally there are old auxiliary transmission options, one of the more practical of them would be a Spicer model 5831. Even so it's a fair amount of weight and old parts to scrounge up and figure out how to install, I'd put it lower on the list than the others linked to above..


Grigg

Last edited by Grigg; 06/24/2011 1:52 PM.
•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
---All pictures---
"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-