Transmission work

I spent a decent part of yesterday afternoon at Pat's, working on the Cord - or rather, Pat and Joe spent a decent part of the afternoon replacing the bent parts of the transmission, while I watched and offered irrelevant suggestions.

The vacuum-driven shift cylinder's rod was bent and broken.  Pat had several available.  Second, the 'dog-bone' rod was bent as well.  I have a spare, but it is pretty rough.  Once again, Pat had at least 6 complete assemblies, so my tab to him continues to grow.

Cord 810/812's have a novel and unique front wheel drive system that was originally designed by Bendix and then modified by Auburn.  First, front wheel drive was unheard of in the 30's, with the exception of another Cord, the L29.  Second, most of us who have driven a manual transmission car recall the gear shifter between the front seats or even on the steering column.  The Cord's is much more elegant:

The picture on the left shows the actual shifter -- it's no bigger than a modern car key, and to shift you press in the clutch and flick the lever to the desired gear.  The business end of the transmission is in front (and in my case, damaged).

In theory, this is really an incredible setup, made even more so considering the time period.  In production however, the early cars transmissions wouldn't hold a gear and would constantly pop out.  Secondly, although today our cars are so completely computerized we wouldn't give a thought to the programming of this mechanism, back in 1936-1937 the design was entirely analogue -- a set of limit switches, placed at the end of the correct range of movement, allowed the system to select the right gear.  But without a feedback system of understanding how the gears inside the transmission were moving, when you select a gear, this system selects it, no matter how much grinding (or even shearing of gear teeth) it causes.

After replacing the entire dog-bone housing, the repaired parts were reassembled on the car.  I am so pleased with how it runs -- maybe 500 or 600 RPM, and nearly silent.  The car now kind-of shifts and we'll have an afternoon of tuning to do.  After that, out comes the interior!