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What is the electrical connection on a TH400 transmission?
Instead of a linkage or cable, the TH400 uses an electrical switch that is most often mounted on the carburetor. The 12-volt connection is a single spade connector just above the oil pan rail on the driver’s side about halfway back–at least that’s where it is on my TH400.
Does a Turbo 400 need a kickdown cable?
th400 dont have a tv/kickdown cable.
Does a TH400 need vacuum?
You do need the vacuum line to go to the modulator valve so that the transmission will shift. This vacuum line is usually connected to manifold vacuum just behind the carb on a SBC, or BBC. Unless you go manual valve body, you must have a vacuum line installed.
What is a transmission kickdown switch?
When the accelerator pedal is depressed all the way to the floor (past the normal full accelerator position), the transmission will automatically engage kickdown, i.e. immediately shift down to a lower gear. …
What does the vacuum modulator do on a Turbo 400?
What does the vacuum modulator do on a Turbo 400? It is equipped with a vacuum modulator that senses change in the engine’s vacuum due to throttle position and load changes. As these changes occur, the modulator adjusts the shift timing of the transmission according to the demand of the engine.
What does a kickdown solenoid do?
The kickback solenoid is located within the transmission of your car. It helps the car to down-shift easier, while at the same time maintaining the desired level of torque as well as speed. In some models, such as the Porsche, this solenoid process may be activated once the vehicle drops below a certain speed.
What does TH400 vacuum modulator do?
It is equipped with a vacuum modulator that senses change in the engine’s vacuum due to throttle position and load changes. As these changes occur, the modulator adjusts the shift timing of the transmission according to the demand of the engine.
What does the transmission kickdown cable do?
One component that helps both drive systems communicate is the kickdown cable. This device helps the engine relay information on revolutions per minute (RPM) to the automatic transmission and essentially tells it that it’s time to shift gears.
What kind of material is the Turbo 400 transmission made of?
The Turbo 400 is primarily constructed of cast aluminum, with the bell housing being integrated into the transmission and also made of cast aluminum. Some areas are cast iron, such as the center support for the transmission.
When did GM stop making the Turbo 400 transmission?
Turbo 400 Transmission (TH400) Specs. The Turbo 400 was placed in many cars across GM as well as other car manufacturers during its long production life. Overall the transmission remained in production an impressive 27 years before it was eventually replaced by a 4 speed electronically controlled transmission, the 4L80E, in 1991.
What does the L mean on a Turbo 400 transmission?
The “3” represents that this is a 3 speed transmission, and in the case of the Turbo 400, a 3 speed automatic transmission. The “L” represents the orientation of the transmission, with L specifically calling out a longitudinally position transmission. The “80” indicates that this transmission was rated for GVW up to 8000 lbs.
Where is the electrical connection on a TH400?
Instead of a linkage or cable, the TH400 uses an electrical switch that is most often mounted on the carburetor. The 12-volt connection is a single spade connector just above the oil pan rail on the driver’s side about halfway back–at least that’s where it is on my TH400.