A2 Automatic
Transmission
A vehicle shifts harshly and has stored several unrelated transmission DTCs. Charging system output measures 11.4 volts at 2,000 rpm with the headlamps on. Which of these could be the cause?
A transmission DTC has been repaired. Technician A says a permanent DTC can be erased with a scan tool command. Technician B says a permanent DTC clears after its monitor runs and passes. Who is right?
Line pressure is measured at normal operating temperature with the results shown. The cause could be a:
| Range and condition | Specification | Measured |
|---|---|---|
| Park, idle | 57–78 psi | 66 psi |
| Drive, idle | 57–78 psi | 64 psi |
| Reverse, idle | 67–105 psi | 41 psi |
| Drive, wide-open throttle | 205–235 psi | 214 psi |
| Reverse, wide-open throttle | 282–316 psi | 152 psi |
Any of these could cause a transmission to lose fluid EXCEPT:
Transmission fluid is pink and milky. Technician A says coolant contamination can destroy the clutch friction material. Technician B says the condition is corrected by a fluid exchange service. Who is right?
The purpose of a servo in an automatic transmission is to:
A shift-by-wire vehicle will not move out of Park and displays a shifter fault message. The brake lamps do not illuminate. What is the MOST likely cause?
On a transmission without a dipstick, the fluid level check is performed with the fluid:
Technician A says a dry dual-clutch transmission cools its clutch discs with airflow. Technician B says a wet dual-clutch transmission cools its clutch packs with fluid. Who is right?
A transmission overheats during towing. Fluid level and condition are correct and no codes are stored. Which of these is the LEAST likely cause?
Specified stall speed is 2,200 rpm. A stall test in Drive reaches 2,850 rpm, and the transmission slips during hard acceleration. Which of these could be the cause?
A vehicle has a harsh 1-2 shift only during hard acceleration on loose gravel. The traction control lamp flashes at the same moment. Which of these could be the cause?
A transmission was overfilled during service and now slips and shifts erratically. Technician A says aerated fluid can cause these symptoms. Technician B says the excess fluid will burn off. Who is right?
The purpose of a transmission fluid warmer is to:
A transmission has a harsh 3-4 shift and no 4-3 downshift immediately after valve body service. Fluid level and condition are correct. What is the MOST likely cause?
A clutch pack is air tested at its case passage after valve body removal. Regulated air pressure should be applied at:
A rebuilt transmission has excessive input shaft end play measured during final assembly. Which of these is the LEAST likely cause?
At a steady 55 mph the scan tool shows the converter clutch commanded fully on, engine speed 1,900 rpm, and turbine speed 1,720 rpm. This indicates:
The reverse lamps illuminate when the selector is placed in Neutral, and the engine cranks with the selector in Drive. Which of these could be the cause?
A transmission has no line pressure in any range at idle. Technician A says the pump is driven by the converter turbine. Technician B says the pump makes pressure once the vehicle moves. Who is right?
On a transmission adapted for engine stop/start, the auxiliary fluid pump is used to:
A transmission operates in one forward gear and reverse only. The MIL is on and a shift solenoid circuit DTC is stored. What is the MOST likely cause?
Transaxle differential side bearing preload is adjusted by:
A front-wheel-drive vehicle vibrates only during hard acceleration from a stop. Which of these is the LEAST likely cause?
A transmission was removed and reinstalled. Engine oil now drips from the bell housing, and the transmission front pump seal area is dry. Which of these could be the cause?
Reading Your Results: A2 Automatic Transmission, Test 1
A score by itself only tells you whether you passed. What follows is how to read the questions you missed on this test, because on A2 the same wrong answer usually means one of two very different things: either you do not know the system, or you stopped at the transmission when the fault was somewhere else.
If you missed the questions where the transmission was not the problem
More questions on this test are decided outside the transmission than inside it, and that is deliberate, because it is the mistake that costs technicians the most time in the bay. Low charging system voltage sets unrelated transmission codes and produces harsh shifts, since the module needs stable voltage before any of its outputs mean anything. A harsh 1-2 shift only on loose gravel with the traction control lamp flashing is the stability system reducing torque, not a shift quality fault. Reverse lamps in Neutral and cranking in Reverse point at a range sensor telling every module the wrong gear. Engine oil at the bell housing after a transmission is reinstalled is a rear main seal, which is an engine repair that happens to be behind a transmission. Before condemning anything internal, confirm that the electrical supply, the inputs, and the neighboring systems are all telling the truth.
If you missed the questions built on a measurement
Three questions here hand you readings and a specification. When those go wrong it is usually because the reading was read in isolation rather than against what it can prove.
If you missed the EXCEPT and LEAST likely questions
Four of these appear on this test, and missing more than one is a reading habit rather than a knowledge gap. Work out what the three real causes share before you look for the odd one. On the fluid loss question, three answers all give fluid a physical path out of the case and one does not. On the overheating-while-towing question, three reduce the system's ability to shed heat under load and one does not. Naming the shared trait first turns a four-way guess into a single check, and it is the highest-value habit you can bring to the real exam.
If you missed the component function questions
The three component questions on this test are not vocabulary. A servo converts hydraulic pressure into the mechanical force that applies a band, so a leaking servo seal shows up as a shift that flares rather than as a leak you can see. A fluid warmer brings the transmission up to operating temperature quickly using engine coolant, which matters because cold fluid is thick, shifts are slow, and the converter clutch stays off. An auxiliary pump on a stop/start vehicle keeps pressure up while the engine is shut off at a light, which is the only reason the transmission is ready to move when the engine restarts. In each case the exam is asking what stops working when that function is lost.