What does the governor do on a transmission?
What does the governor do on a transmission?
They provide the inputs that tell the transmission when to shift. The Governor is connected to the output shaft and regulates hydraulic pressure based on vehicle speed. Of course, vehicle speed is not the only thing that controls when a transmission should shift, the load that the engine is under is also important.
What determines transmission governor pressure?
Shift Valves As speed increases, the governor pressure (affected by vehicle speed) increases until it overcomes throttle pressure, moves the shift valve, and causes an upshift. When throttle pressure overcomes governor pressure, the transmission downshifts.
What does a transmission governor pressure solenoid do?
Governor pressure sensors and solenoids help keep automatic transmissions running smoothly. For that reason, the governor pressure sensor and solenoid repair kit is also known as an auto transmission governor repair kit.
How does governor pressure work in a transmission?
Shift Valves: Shift valves control hydraulic pressure flow to the reactionary devices (clutches and bands) that drive and hold members of the planetary gearset. Transmissions change gears by moving shift valves. Governor pressure works on one end of the valve, and a spring assisted by throttle pressure works on the other.
When does throttle pressure overcome the governor pressure?
When throttle pressure overcomes governor pressure, the transmission downshifts. When a driver accelerates to pass another vehicle, there’s an increase in throttle pressure, causing a downshift. These two pressures control shift valve movement.
What happens when the governor pressure goes up?
Now you take your foot off the break but don’t hit the gas. The car will slowly speed up and the governor pressure will go up. When the governor pressure is high enough it will overcome the spring and slide the spool valve over turning off first gear and turning on second gear.
Is there a problem with the 46RE pressure sensor?
It sounds to me like this is a common problem on the 46RE’s and these parts usually solve it. I had the owner of the shop change everything out today and things went fine, but the problem appears to be still there.
Shift Valves: Shift valves control hydraulic pressure flow to the reactionary devices (clutches and bands) that drive and hold members of the planetary gearset. Transmissions change gears by moving shift valves. Governor pressure works on one end of the valve, and a spring assisted by throttle pressure works on the other.
When throttle pressure overcomes governor pressure, the transmission downshifts. When a driver accelerates to pass another vehicle, there’s an increase in throttle pressure, causing a downshift. These two pressures control shift valve movement.
Now you take your foot off the break but don’t hit the gas. The car will slowly speed up and the governor pressure will go up. When the governor pressure is high enough it will overcome the spring and slide the spool valve over turning off first gear and turning on second gear.
It sounds to me like this is a common problem on the 46RE’s and these parts usually solve it. I had the owner of the shop change everything out today and things went fine, but the problem appears to be still there.
