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ASE Automobile & Light Truck (A1–A8) — Practice Exam

A2 Diagnosis: practice questions

Our ASE A1–A8 bank has 30 questions on this topic. Here are 5 of them with answers; the full mock exam draws from every topic, like the real one.

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Question 1 · A2 Automatic Transmission/Transaxle

A shudder occurs when the torque converter clutch applies at about 45 mph. What is a common cause?

  1. A dirty air filter
  2. Worn TCC friction material or degraded fluid
  3. Low tire pressure
  4. A faulty brake switch that keeps the clutch from applying
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B. Worn TCC friction material or degraded fluid — Some makers recommend a fluid change with friction modifier first.

Question 2 · A2 Automatic Transmission/Transaxle

Milky, pink transmission fluid usually means what?

  1. The fluid level is low
  2. Coolant has entered the fluid, often through the radiator's transmission cooler
  3. The fluid is overheated from towing or from a slipping torque converter clutch
  4. The wrong fluid type was used
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B. Coolant has entered the fluid, often through the radiator's transmission cooler — The transmission usually needs overhaul and the cooler replacing.

Question 3 · A2 Automatic Transmission/Transaxle

What can overfilling an automatic transmission cause?

  1. No effect, as the excess drains away
  2. Fluid foaming, slipping and fluid pushed out the vent
  3. Better cooling
  4. Higher line pressure and quicker, firmer shifts at all speeds
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B. Fluid foaming, slipping and fluid pushed out the vent — Rotating parts churn air into overfilled fluid.

Question 4 · A2 Automatic Transmission/Transaxle

What does a pressure control solenoid usually regulate?

  1. Line pressure based on TCM commands
  2. The parking pawl
  3. Engine idle speed
  4. Torque converter fill and cooler flow only
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A. Line pressure based on TCM commands — It's often a variable force or pulse-width modulated solenoid.

Question 5 · A2 Automatic Transmission/Transaxle

What is the main purpose of a stall test?

  1. To test the fluid temperature sensor
  2. To check shift points and torque converter clutch apply speed on the road test
  3. To check the torque converter one-way clutch and the holding ability of clutches and bands
  4. To measure top speed in drive
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C. To check the torque converter one-way clutch and the holding ability of clutches and bands — Many manufacturers no longer recommend it; follow service information and limit duration.

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