What kind of clutch does the GM TH400 use?
After the center support and intermediate clutch pack installation is complete, air test the clutch pack. Install the intermediate band into the case. Two types of direct drums were used in the TH400. The notched drum (left) uses a roller-type clutch, while the smooth drum (right) uses a sprag-type clutch.
How does a GM Turbo 400 transmission work?
At low speeds, or at nearly idle engine speed, there is enough distance between the two fans to allow one to turn without moving the other. But as engine RPM increases, so does fluid flow. The opposing fan, which is connected to the transmission’s input shaft, reacts from the force and flow of the incoming fluid and begins to turn the input shaft.
What kind of oil pump does a GM Turbo 400 use?
TH400 transmissions use a geartype oil pump. The inner gear is driven directly by the hub of the engine’s torque converter. Note that the outer gear is offset in the housing. This creates a chamber that moves oil and forces it out of the pump.
What are the parts of the Turbo 400?
TURBO 400 PERFORMANCE PARTS TH400 Steel Forward Drum & Input Shaft Product #223600B The Turbo 400 Billet Steel Forward Drum and Heavy Duty Input Shaft is made for high horsepower and high torque drag racing and motorsport applications. * Drum is machined from solid 4140 HTSR steel. * Input Shaft machined from 300 Maraging.
What kind of input shaft for Turbo 400 drum?
TH400 Steel Forward Drum & Input Shaft Product #223600B The Turbo 400 Billet Steel Forward Drum and Heavy Duty Input Shaft is made for high horsepower and high torque drag racing and motorsport applications. * Drum is machined from solid 4140 HTSR steel. * Input Shaft machined from 300 Maraging.
Which is the strongest gear set in the Turbo 400?
“The gear set design in the Turbo 400, even in OEM form, is probably the strongest gear set design ever developed by the “big three” auto manufacturers. Even the factory gear sets can handle upwards of 2,000 horsepower without an issue, which is unheard of out of any other transmission. It’s just a fundamentally strong transmission.
Why is the Turbo 400 used in drag racing?
Before we get into the build, you may be wondering why the Turbo 400 has become a go-to automatic transmission for so many race teams, from fast bracket racers all the way up to 4,000 horsepower Pro Modifieds. Many recognize it as a production tranny from GM but what makes it so suitable this environment?