How can I set up a spare governor to shift into high gear on my turbo 400 at very low speed and stay there for chassis dyno sessions? Stall is approximately 3400 so for wot tests, need tranni to stay in high gear from say 3,000 rpm till redline. I know what to do to increase shift point rpms….not sure how to create a “stay in high gear at low rpm” governor. I have spare governors and weights and springs. Thanks
I think i need the governor to short shift and stay in high gear. The governor ultimately decides when tranni shifts at wot. Im not 100% sure but I believe the downshift solenoid adds line pressure as well when activated.
Get a spare govenor, and spare modulator valve. Weld the weights out in the wide open position. Assuming the valve body has been set up for a manual/automatic shift you just created a poor man’s manual valve body. Keep in mind, there will be no automatic features. Whatever gear the shifter is in, that’s the gear it’s going in. If you study the hydraulic chart, you will see govenor oil is directed to the large land on the modulator valve. Once the vehicle reaches high speed (or in this case the govonor welded into max position) govenor oil begins to apply pressure to the modulator valve, reducing line pressure at high speeds. You can actually see this on a line pressure test, around 70ish mph line pressure begins to drop. Grinding a flat on the large land defeats this. Disconnect the kickdown switch.
