I'm not sure if this is the right place or maybe classic Buick might be better. I had the trans rebuilt a few years ago only for leaks. Was working fine otherwise. So I can't take it back. Plus I moved. The switch pitch didn't work after the rebuild. I never noticed it until accelerating hard one day and then we moved shortly after. I have all the manuals, but thought someone might have some input on where to start? From what I understand these trans never shift unless done so manually. They accelerate off the torque converter.
I never heard of VP converters being used in cars previous to 1964. Perhaps you are referring to the kickdown function.
Matt, the Dynaflow was the precursor to the switch pitch that was used from 1965-67. https://www.hemmings.com/stories/article/smooth-operator There were several versions of it.
The "Switch Pitch" was offered on the DynaFlow starting in 1955. When the pedal was at WOT the switch pitch worked in low & reverse also. One thing you DON'T want to do with a DynaFlow is shift from low to drive at WOT. Causes MANY BAD things to happen. In MOST DynaFlow equipped vehicles because of the lower, numerically, lower gears you could go threw the 1/4 mile mostly in low gear. I had a '57 Century that I won alot of money with. I could hold low gear until 110 MPH. Nobody believed it & would put a $20.00 bill on the front seat which of course I snatched up as soon as the speedo read 110. Tom T.
Hopefully that's all it is. I need to get the manual out. Was hoping someone might have had experience with these transmissions. I'm not sure it would be called a "kick down" per say when you are switching between high and low stall mode. Since it's a single speed transmission unless manually putting in low. I'm hoping it's not internal and something to do with fluid coupling or valving. I'm sure when I get the manual out I'll get an overall picture of what's taking place. Car is in storage right now, but will be home at the end of the month.
