Cletis:
Here is a site with a scan of all the manuals on the 3 speed overdrive. I have one with synchro first using a floor shifter in my 1966 GMC with 305E v6. The tranny is a great addition. My rear end is a 3.56. I normally let the transmission shift to overdrive in second at 26 mph. Around town it acts like an auto shifting at this speed and downshifting when the speed drops off. When I get over 40 mph I shift from second with overdrive to 3rd with overdrive. Gives a nice gear for the highway where my V6 is not screaming to keep up.
I haven't seen Fred reply yet, but he frequents this site and has a great deal of experience with these transmissions. He was very helpful when I set mine up. You can do a search and find his replies.
Regards,
Steve
New Orleans
http://www.speedprint.com/deves50/overdriveindex.php
