Exam 9: Torque Converter Principles

The amount of end play measured does not need to be compared to specifications.

A fluid coupler has none of the converter components physically connected to one another.

What is the operating condition where the turbine is stationary and the engine throttle is wide open, making the rotational speed of the impeller as high as possible?

Two technicians are discussing transmission heat exchangers. Technician A says when installing an add-on cooler, you should plum the cooler so the transmission fluid goes through the add-on cooler before the radiator. Technician B says when installing an add-on cooler, you should plum the cooler so the transmission fluid goes through the radiator before the add-on cooler. Who is correct?

Lock-up torque converters are controlled by:

It is common for some torque converter rebuilders to replace every bushing during the rebuilding process.

What is the operating condition called, where the turbine is stationary and the engine throttle is wide open, making the rotational speed of the impeller as high as possible?

A torque converter does all of the following except:

A torque converter on a transmission that suffered a catastrophic failure should always be replaced due to difficulty in removing all of the debris.

Torque converters create excess heat that must be removed by:

A vehicle with an Allison transmission comes in to the shop with poor acceleration and no reverse. You test drive the vehicle and determine that there is no 1st or reverse gear. Tech A states that the problem could be a bad C3 clutch. Tech B states that the problem could be a bad C5 clutch. Who is correct?

Technician A says early torque converters always have some slippage, so manufacturers added a lockup clutch to the torque converter. Technician B says typically, torque converter lockup will only happen when the vehicle is under an appropriate load and speed. Which technician is correct?

Which of the following provide a large mass to dampen crankshaft vibrations?

Technician A says a single-stage torque converter contains an impeller, a turbine, and a stator. Technician B says a torque converter clutch is used to lock the turbine to the impeller when the vehicle is operated under light loads, to improve fuel economy. Who is correct?

A sticking brake light switch can cause a torque converter clutch to fail.

Stall speed is defined as:

Technician A says that a one-way roller that doesn't hold while turning in both directions is good to use for reassembly. Technician B says that once a one-way roller tests ok, it should be lubricated with any type of transmission fluid. Who is correct?

What unlocks the stator's one-way clutch, allowing the stator to rotate with the fluid?

How does a lock-up converter obtain lock-up?

Before reusing a torque converter, the end play should always be checked.