Unit Removal, Installation and Disassembly Flashcards

A technician is installing an automatic transmission on a rear-wheel-drive vehicle. After sliding the converter onto the input shaft and stator support, which check best confirms the converter is fully seated in the pump before the transmission is raised to the engine?

Answer: The converter drive lugs or studs sit slightly behind the bell housing mounting face when checked with a straightedge

Measuring the converter lugs or studs against the bell housing face with a straightedge shows whether the hub is fully engaged with the pump drive gear. If the lugs sit proud of the specification, the converter is not seated.

A technician must reprogram a transmission control module with a manufacturer calibration update using a pass-through programming tool. Which step is most important to take before starting the flash?

Answer: Connect a battery maintainer to hold stable system voltage during programming

Voltage that drops during a flash can corrupt the software and leave the module unusable. A battery maintainer or power supply holds voltage steady.

While inspecting a gear-type oil pump, a technician needs to measure gear end clearance. Which method is correct?

Answer: Lay a straightedge across the pump body and measure the gap to the gear face with a feeler gauge

End clearance is the gap between the gear face and a straightedge laid on the pump body. A feeler gauge measures that gap, and the reading is compared to specification.

Which tools are used to accurately measure the inside diameter of a transmission bushing so it can be compared to specification?

Answer: A telescoping gauge and an outside micrometer

A telescoping gauge is set inside the bushing and then measured with a micrometer, which gives the inside diameter.

When inspecting a planetary carrier assembly, a technician checks pinion gear end play by inserting a feeler gauge between each pinion and the carrier. What does a reading above specification indicate?

Answer: The pinion thrust washers or carrier are worn and the assembly should be replaced or repaired

Excess pinion end play means the thrust surfaces or the carrier are worn beyond limits. The assembly needs repair or replacement.

A technician measures the clearance of a multiple-disc clutch pack by inserting a feeler gauge between the pressure plate and the snap ring, with the clutch pack stacked. The clearance is greater than specification. What is the usual correction?

Answer: Install a thicker selective snap ring or pressure plate

Too much clearance is taken up by a thicker selective snap ring or pressure plate. This restores the correct clutch pack clearance.

A technician measures transmission input or output shaft end play with a dial indicator mounted on the case. If end play is outside specification and the unit uses selective parts, how is it normally corrected?

Answer: Change to a selective thrust washer or spacer of different thickness

End play is adjusted with a selective thrust washer or spacer in the correct thickness. The dial indicator measurement determines which size is needed.

A transmission is being lowered from a vehicle on a transmission jack. What should the technician do to keep the torque converter from sliding forward out of the transmission?

Answer: Install a converter holding bracket or strap across the bell housing opening

A converter holding bracket or strap keeps the converter in place while the transmission is moved. Without it, the converter can slide out and drop, spilling fluid and damaging parts.

During valve body inspection, a technician finds that a spool valve is sluggish in its bore. What is the best test of whether the valve and bore are acceptable?

Answer: The lubricated valve should fall through the bore under its own weight when the body is tilted

A clean, lubricated valve should move freely and fall by its own weight. If it does not, the valve or bore is dirty, burred, or worn.

When bolting the torque converter to the flexplate, which procedure is correct?

Answer: Install all bolts by hand first, then tighten them evenly in a crisscross pattern to specification

Starting all the bolts by hand and tightening evenly in a pattern prevents flexplate and converter distortion. The bolts are then torqued to specification.