Can anyone explain to me whats the purpose of these parts and how they work and do they have anything to do with idle?
Paid $2800 just like it is!
The answer to your question is yes you do need to hook them up to have proper idle and transmission function.
Bruce Roe makes an electronic control box for the switch pitch. You can contact him at firstname.lastname@example.org The switch pitch function is very simple. There are two flat connectors on the left side of the transmission. One is horizontal, the other vertical. The horizontal one is the switch pitch (stator) control. Apply 12 volts, you get high stall, take it away, you get low stall, so disconnected, you are stuck in low stall. The vertical connector is the kick down. Apply 12 volts, the transmission down shifts, take it away, it up shifts. You can hook up a simple momentary or toggle switch to conduct 12 volts to either connector. Make sure you still have the switch pitch transmission. If you are not the original owner of the car, you can't be sure what was replaced or converted. I have included some pictures of Bruce's electronic control box.
Here is another option for the kick down activation,
1970 GS455 Stage1 Race weight 4025 lbs.
TSP 470, 602 HP, 589 TQ
MT headers, Gear Vendors Overdrive
Best E.T. 11.54 Best MPH, 116.06
1998 Riviera SC3800
Wow thank you guys. Tomorrow i will follow that wire and see if its the same connection as the picture you took. If i get a chance i may take a picture myself and post it here as well.
If you switch is there, follow the "How to wire the Switch Pitch on a Buick Transmission" link at the top of this page.
Here's some on Ebay:
Buick kickdown switch
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Okay I was unable to upload any pictures because I'm not too familiar with this site but I do have a th400 transmission I do have the connection but there's nothing to connect it to so my question is do I try to buy one from eBay or do I try to get the one that has been built by Bruce Roe? Would like your opinions on both options
Last edited by wildlos; 03-31-2018 at 06:38 AM.
How many spades are on the plug coming out of the transmission? You do not have a switch pitch if there is only one. In that case, there is only the detent for downshifting. It needs a power switch that is activated by 3/4 throttle. There are any number of switches for this. Your best bet would be to adapt one from a similar car found in a junk yard.
67 GS 525 Buick Stage IV
66 GS Convertible
65 GS HT
02 Subaru WRX Turbo
03 Ford Cobra Convertible (Factory Supercharged)