Exam 9: Reaction and Friction Units

​Name the different types of bands.

A servo expands a band when hydraulic pressure pushes against the piston.

The forward clutch normally contains a Belleville-type return spring.

​A _______________ and its _______________ are always used as holding devices and are never used to drive a member of the gearset.

A(n)____________________ provides strong holding power and has band segments.

____________________ is an operational condition that results from using the engine to brake while decelerating.

____________________ is a linkage that acts on both ends of a band to tighten it around the drum.

A(n)____________________ improves clamping force and acts as a return spring.

____________________ are smooth metal rings that do not have friction material on them.

A(n)____________________ is a heavy metal plate that provides a clamping surface for the clutch plates.

Technician A says to drive one member of the planetary gear set, a multiple disc clutch can be used. Technician B says to hold one member of the planetary gear set, a multiple disc clutch can be used. Who is correct?

Technician A says if a friction disc looks burned but there is sufficient friction material remaining, it can be serviced. Technician B says if the steel plates in a clutch disc assembly are worn flat, they should be replaced. Who is correct?

​Technician A says a band apply pin may be selective. Technician B says most bands are not adjustable as routine maintenance. Who is correct?

Shift feel is affected by power pulses.

Some apply circuits use an accumulator to slow down the application of the holding device.

Technician A says a hydraulic piston assembly known as an accumulator helps the servo quickly apply the brake band. Technician B says to apply the brake band, a hydraulically operated piston assembly known as a servo is used. Who is correct?

When a multiple-disc pack is used as a _______________, there is no need for the check ball.  Since the unit does not rotate, centrifugal force will have no effect on the fluid behind the piston.

Technician A says an internal leak at the servo is indicated if the fluid pressure increases during servo application. Technician B says a clogged oil filter or low oil pump output is indicated by high fluid pressure. Who is correct?

​Technician A says transmissions use compound planetary gears that are controlled by friction and reaction devices. Technician B says clutch and brake application charts are a must during diagnosis and transmission overhaul. Who is correct?

Technician A says adjusting screws are found on some bands. Technician B says locknuts and adjusting screws are found on the outside of the transmission case on all bands. Who is correct?