Frequently Asked Questions
|
|
What is a torque converter stall speed and how do I check it?
Torque converter stall speed is the maximum engine RPM that can be developed when the transmission is in gear, drivetrain is put in a "locked" condition and the engine is accelerated to full throttle. This test is usually performed by installing a tachometer, setting the brakes, and placing the fully loaded machine against an immovable object and accelerating the engine to full throttle. This duration of this test should never exceed 30 seconds since it creates a lot of heat and puts a great deal of strain on the entire drivetrain. If the stall speed is 200 or 300 RPM's low, this is usually indicative of an engine that is not developing it's rated horsepower or torque due to any of a wide variety of causes. If the stall speed is in the range of 600-1000 RPM's low, this usually indicates a faulty sprag clutch in the torque converter. Stall speeds more than 5% over rated stall RPM's usually indicates a slipping clutch pack. One very popular cause of this condition is improperly adjusted inching.
|