Question 1

How many overdrive gear ratio(s) does the 5-speed version of an Allison transmission have?

Accepted Answer

The 5-speed version of an Allison transmission typically has one overdrive gear ratio.

Question 2

The 6-speed version of an Allison transmission has ________

Accepted Answer

The answer of The 6-speed version of an Allison transmission...

Question 3

Tech A states that the Allison transmission can be identified by a standard stamped metal tag on the body of the transmission. Tech B states that all Allison transmissions are five-speed transmissions. Who is correct?

Accepted Answer

Allison transmissions typically have a stamped metal tag for identification, but not all Allison transmissions are five-speed; they come in various configurations.

Question 4

The 1000 series Allison transmission is rated for ________ gross vehicle weight.

Accepted Answer

The answer of The 1000 series Allison transmission is rated...

Question 5

Which of the following Allison transmission is rated for 30,000 pounds gross vehicle weight?

Accepted Answer

The answer of Which of the following Allison transmission is...

Question 6

The 2400 series Allison transmission is rated for ________ gross vehicle weight.

Accepted Answer

The 2400 series Allison transmission is typically rated for a gross vehicle weight of 26,000 pounds.

Question 7

Tech A states that each version of an Allison transmission has a separate rebuild kit. Tech B states that only one rebuild kit is sold for all the versions of an Allison transmission. Who is correct?

Accepted Answer

The answer of Tech A states that each version of...

Question 8

The Allison transmission is completely ________ controlled.

Accepted Answer

The Allison transmission is completely electronically controlled, using electronic systems to manage its functions.

Question 9

Tech A states that the solenoids of an Allison transmission use pulse width modulation. Tech B states that the solenoids do not use pulse width modulation. Who is correct?

Accepted Answer

The answer of Tech A states that the solenoids of...

Question 10

The torque converter clutch solenoid of an Allison transmission operates on a frequency of ________

Accepted Answer

The torque converter clutch solenoid of an Allison transmission operates on a frequency of 100 Hertz.

Question 11

What is the resistance value of trim A solenoid?

Accepted Answer

The resistance value of trim A solenoid is typically in the range of 5.5-8.0 ohms.

Question 12

Identify the solenoid that has a resistance value of 20-30 ohms.

Accepted Answer

Shift Solenoid E typically has a resistance value within the range of 20-30 ohms.

Question 13

Tech A states that hydraulic fluid cannot move through the solenoids of an Allison transmission very quickly. Tech B states that the trim solenoids operate at a frequency of 1000 Hz and open and close 1000 times per second. Who is correct?

Accepted Answer

The answer of Tech A states that hydraulic fluid cannot...

Question 14

The output pressure of trim solenoid A of an Allison transmission is at 0 psi. Tech A states that the solenoid could be in failsafe mode. Tech B states that solenoid may have full current. Who is correct?

Accepted Answer

The answer of The output pressure of trim solenoid A...

Question 15

When installing the main shaft, if the shoulder of the main shaft sticks up more than 0.100 inches from the planet carrier shaft:

Accepted Answer

Rotating the main shaft can help it seat properly if it is not aligned correctly, which might be causing it to stick up.

Question 16

In order to remove the manual linkage from the transmission, the roll pin will need to be removed using a:

Accepted Answer

The answer of In order to remove the manual linkage...

Question 17

For how long should all frictions be soaked in the specified automatic transmission fluid before being installed into the transmission?

Accepted Answer

Soaking the frictions in the specified automatic transmission fluid for at least 15 minutes allows them to absorb the fluid and become saturated, which helps to prevent premature wear and failure.

Question 18

All of the following can be used in cleaning a valve except:

Accepted Answer

The answer of All of the following can be used...

Question 19

When installing the bell housing onto the pump, the bolts should be torqued to:

Accepted Answer

The answer of When installing the bell housing onto the...

Question 20

A vehicle with an Allison transmission comes in to the shop with a code for a crankshaft speed sensor. Tech A states that the torque converter may be damaged. Tech B states that the code may indicate the transmission is slipping. Who is correct?

Accepted Answer

The crankshaft speed sensor monitors the speed of the crankshaft. If the torque converter is damaged, it can cause the crankshaft speed to fluctuate, which can trigger the code for the crankshaft speed sensor.

Quiz 28: Allison 1000 and 2000 Series Transmissions