mgaugustine
Member
I would like to swap the third member from a dynaflo car into an earlier (1940 Roadmaster) to drop a few RPM off at highway speeds. I have heard that the later style third member should have a number stamped on the bottom of the banjo (housing center) that should read something like 3/2, 3/4, 3/6 referring to 3.20, 3.40 and 3.60 ratios. These are NOT the numbers I find stamped there. I have available to me (for a price) these three to choose from, and cannot turn them to determine the ratio.... but know that they are stamped at the center of the housing with these numbers...788-40, 912-B, 913-70. No sign of anything like the numbers with slashes. Does anybody know what these numbers mean? I assume the "Dash 40" and the "Dash 70" refer to the series, respectively special and roadmaster... but what the heck is the "Dash B"? Could this be the impossible to find optional 3.20 ratio that I have heard about?
In any case, if anybody knows what these numbers mean, I would sure like to know about it. Thanks.
In any case, if anybody knows what these numbers mean, I would sure like to know about it. Thanks.