Chap 129

Caution should be used when performing a stall test because

All of the above

A scan tool can be used to ________________. a)Check for stored diagnostic trouble codes b)All are correct c)Command a shift d)Check for transmission-related sensor information

b)All are correct

Two technicians are discussing what could be wrong with a hydraulically shifted transmission/transaxle that does not shift out of first gear regardless of vehicle speed. Technician A says that a defective governor could be the cause. Technician B says that a weak pump could be the cause. Which technician is correct?

tech A only

A General Motors vehicle is being tested using a scan tool. The input speed and the output speed sensor read the same when at highway speed. Technician A says that the transmission/transaxle is in a gear where the ratio is 1:1. Technician B says that the torque converter clutch must be defective and not working. Which technician is correct?

Tech A

An electronically controlled overdrive automatic transmission is equipped with a transmission fluid temperature sensor. Technician A says that the shifts may be changed if the fluid temperature is too high. Technician B says that overdrive may be disabled if the transmission fluid temperature is too high. Which technician is correct?

Both technicians A and B

Technician A says that the apply and holding units are usually the same for first gear when the gear selector is in drive or manual first. Technician B says that a defective vacuum modulator could cause the automatic transmission to delay shifting until higher-than-normal speed is achieved. Which technician is correct?

Both technicians A and B

Two technicians are discussing inspection of the transmission pan. Technician A says that some friction material at the bottom of the pan is normal. Technician B says that if any metal parts stick to the magnet that further investigation is needed to determine the cause. Which technician is correct?

Both technicians A and B

An electronically controlled automatic transmission operates okay in reverse, but the vehicle does not shift at all when moving forward. Technician A says that a defective torque converter is the likely cause. Technician B says that a defective shift solenoid could be the cause. Which technician is correct?

Tech B only

Two technicians are discussing an automatic transmission that will not go into any forward gear or reverse. Technician A says that a defective PCM or TCM could be the cause. Technician B says that a defective or worn pump could be the cause. Which technician is correct?

Tech B only

Fluid exchange can be performed using ______________. a)A machine that replaces the ATF through the cooler lines b)A machine that forces the old fluid out, using a pump inside the machine that is attached to the fluid inlet after removing the transmission pan and filter c)Drain and refill three times d)All are correct

d)All are correct