Drivetrain & Transmission Diagnostics Questions With
Complete Solutions
Air test pressure Correct Answers Approximately 40 psi
applied to the appropriate passage.
Bidirectional scan tool Correct Answers Lets you command
outputs yourself.
Bore Correct Answers Hole the valve moves inside
Cause of engine starting in Neutral but not Park Correct
Answers Misadjusted linkage/cable or faulty transmission
range/neutral-safety switch.
Check ball Correct Answers One-way fluid control
Check balls function Correct Answers Open or block passages
depending on fluid pressure.
Clicking noise while turning Correct Answers Often indicates a
worn outer CV joint.
Common transmission computer outputs Correct Answers Shift
solenoids, pressure-control solenoid, and TCC solenoid.
Common transmission input signals Correct Answers Vehicle
speed, engine load, throttle position, ATF temp, range, shaft
speeds, brake application.
Component Correct Answers Simple job
, Control valve Correct Answers Directs coolant/ATF
Cooler Correct Answers Removes ATF heat
Cooler line Correct Answers Carries ATF
Driveshaft yoke function Correct Answers Connects the
driveshaft to the transmission output.
Effect of a damaged or mispositioned valve-body gasket
Correct Answers Pressure crosses between circuits, resulting in
incorrect transmission operation.
Effect of a restricted transmission fluid filter Correct Answers
Starves the pump, causing low pressure/flow, slipping, and
delayed engagement.
Effect of a restricted valve body screen Correct Answers
Reduces fluid flow, leading to hydraulic and solenoid issues.
Effect of excessive accumulator cushioning or leakage Correct
Answers Clutch applies too slowly, causing slip/flare, heat, and
clutch damage.
Effect of excessive shaft bushing clearance Correct Answers
Shaft wobbles, preventing the seal from maintaining contact,
causing ATF leaks.
Effect of high resistance Correct Answers Creates excessive
voltage drop.
Complete Solutions
Air test pressure Correct Answers Approximately 40 psi
applied to the appropriate passage.
Bidirectional scan tool Correct Answers Lets you command
outputs yourself.
Bore Correct Answers Hole the valve moves inside
Cause of engine starting in Neutral but not Park Correct
Answers Misadjusted linkage/cable or faulty transmission
range/neutral-safety switch.
Check ball Correct Answers One-way fluid control
Check balls function Correct Answers Open or block passages
depending on fluid pressure.
Clicking noise while turning Correct Answers Often indicates a
worn outer CV joint.
Common transmission computer outputs Correct Answers Shift
solenoids, pressure-control solenoid, and TCC solenoid.
Common transmission input signals Correct Answers Vehicle
speed, engine load, throttle position, ATF temp, range, shaft
speeds, brake application.
Component Correct Answers Simple job
, Control valve Correct Answers Directs coolant/ATF
Cooler Correct Answers Removes ATF heat
Cooler line Correct Answers Carries ATF
Driveshaft yoke function Correct Answers Connects the
driveshaft to the transmission output.
Effect of a damaged or mispositioned valve-body gasket
Correct Answers Pressure crosses between circuits, resulting in
incorrect transmission operation.
Effect of a restricted transmission fluid filter Correct Answers
Starves the pump, causing low pressure/flow, slipping, and
delayed engagement.
Effect of a restricted valve body screen Correct Answers
Reduces fluid flow, leading to hydraulic and solenoid issues.
Effect of excessive accumulator cushioning or leakage Correct
Answers Clutch applies too slowly, causing slip/flare, heat, and
clutch damage.
Effect of excessive shaft bushing clearance Correct Answers
Shaft wobbles, preventing the seal from maintaining contact,
causing ATF leaks.
Effect of high resistance Correct Answers Creates excessive
voltage drop.
