Switch Pitch

[Robert Harris]

The switch pitch convertor was used to replace low gear of the four speed
hydramatic transmission when GM upgraded the design to the "Turbo-Hydromatic"
and was available only with the 400 and only on the heavier cars.  

Not so much a starting gear as a "passing" gear.  Nice smooth "downshift"
unlike shifting gears - so as to not disturb the passengers and simply
smoothly allow a nice increase in power to swoop around the peasants.

Properly done it can save a lot of wear and tear on transmissions etc.  

My dream would be a switch pitch that would lock up. Then could have a heavy
duty and economical xmission.

1963 Ford C-600 Prison Bus Conversion "Home"
1971 Lincoln Continental 460 "Christine"
1972 "Whale" Mustang awaiting transplant
1978 Dodge Long Bed Peeek Up "Bundymobile"

Habaneros - not just for breakfast anymore