Question 1

The Allison 1000, 2000, and 2400 series transmissions can be identified by the stamped metal tag on the body of the transmission.

Accepted Answer

A) True 
 B)False

Question 2

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

A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B 
A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B

Question 3

The 6-speed version of an Allison transmission has ________

Accepted Answer

A)  four overdrive ratios 
B)  three overdrive ratios 
C)  a single overdrive ratio 
D)  dual overdrive ratios 
A)  four overdrive ratios 
B)  three overdrive ratios 
C)  a single overdrive ratio 
D)  dual overdrive ratios

Question 4

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

Accepted Answer

A)  screwdriver. 
B)  pair of vise grips. 
C)  wrench. 
D)  sharp pick. 
A)  screwdriver. 
B)  pair of vise grips. 
C)  wrench. 
D)  sharp pick.

Question 5

What does the transmission use to attain the different gear ratios?

Accepted Answer

A)  Dog clutches 
B)  One-way rollers 
C)  Multiple disc clutches 
D)  Brake bands 
A)  Dog clutches 
B)  One-way rollers 
C)  Multiple disc clutches 
D)  Brake bands

Question 6

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

A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B 
A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B

Question 7

What is the special tool required to remove the C4 snap ring from an Allison 1000/2000 transmission?

Accepted Answer

A)  GM Special tool 
B)  Snap ring tool 
C)  Spring compressor 
D)  Pick type tool 
A)  GM Special tool 
B)  Snap ring tool 
C)  Spring compressor 
D)  Pick type tool

Question 8

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

Accepted Answer

A)  30,000 pounds 
B)  19,850 pounds 
C)  26,000 pounds 
D)  11,793 pounds 
A)  30,000 pounds 
B)  19,850 pounds 
C)  26,000 pounds 
D)  11,793 pounds

Question 9

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

A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B 
A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B

Question 10

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

Accepted Answer

A)  100 Hertz 
B)  350 Hertz 
C)  250 Hertz 
D)  400 Hertz 
A)  100 Hertz 
B)  350 Hertz 
C)  250 Hertz 
D)  400 Hertz

Question 11

The resistance value of the torque converter clutch solenoid is:

Accepted Answer

A)  8-15 ohms. 
B)  5.5-8.0 ohms. 
C)  10-20 ohms. 
D)  20-30 ohms. 
A)  8-15 ohms. 
B)  5.5-8.0 ohms. 
C)  10-20 ohms. 
D)  20-30 ohms.

Question 12

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

Accepted Answer

A)  1000 series 
B)  2000 series 
C)  2400 series 
D)  3000 series 
A)  1000 series 
B)  2000 series 
C)  2400 series 
D)  3000 series

Question 13

An Allison transmission comes in to the shop with ratio error codes for all gears. Tech A states that the transmission output shaft speed sensor could be faulty. Tech B states that the output shaft speed sensor can be checked with a DC voltmeter. Who is correct?

Accepted Answer

A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B 
A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B

Question 14

All of the following statements with respect to the speed sensors are true except:

Accepted Answer

A)  They are variable reluctor sensors that produce an AC sine wave that can be interpreted by the transmission control module. 
B)  Most gas engines use the engine speed sensor. 
C)  The turbine speed sensor senses speed from the PTO gear mounted on the C1/C2 clutch housing. 
D)  The NSBU switch will prevent the truck from starting in any gear except park or neutral. 
A)  They are variable reluctor sensors that produce an AC sine wave that can be interpreted by the transmission control module. 
B)  Most gas engines use the engine speed sensor. 
C)  The turbine speed sensor senses speed from the PTO gear mounted on the C1/C2 clutch housing. 
D)  The NSBU switch will prevent the truck from starting in any gear except park or neutral.

Question 15

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

Accepted Answer

A)  At least 15 minutes 
B)  At least 30 minutes 
C)  At least 1 hour 
D)  At least 1 day 
A)  At least 15 minutes 
B)  At least 30 minutes 
C)  At least 1 hour 
D)  At least 1 day

Question 16

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

Accepted Answer

A)  30,000 pounds 
B)  19,850 pounds 
C)  26,000 pounds 
D)  11,793 pounds 
A)  30,000 pounds 
B)  19,850 pounds 
C)  26,000 pounds 
D)  11,793 pounds

Question 17

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

Accepted Answer

A)  30,000 pounds 
B)  19,850 pounds 
C)  26,000 pounds 
D)  11,793 pounds 
A)  30,000 pounds 
B)  19,850 pounds 
C)  26,000 pounds 
D)  11,793 pounds

Question 18

The disassembly of an Allison 1000/2000 transmission is being discussed. Technician A says that the internal filter should be removed after the valve body is removed. Technician B says that a special tool is required to remove the electrical harness from the transmission case. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both Technicians A and B 
D)  Neither Technicians A nor B 
A)  Technician A 
B)  Technician B 
C)  Both Technicians A and B 
D)  Neither Technicians A nor B

Question 19

You are testing the solenoids on an Allison transmission and find the resistance of the trim solenoids to be 12.3 ohms. Tech A states that the solenoids need to be replaced. Tech B states that the resistance should be higher than 12.3 ohms. Who is correct?

Accepted Answer

A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B 
A)  Tech A 
B)  Tech B 
C)  Both A and B 
D)  Neither A nor B

Question 20

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

A)  rotate the main shaft to attempt to get it to seat back down. 
B)  try to install without the main shaft support tool. 
C)  remove the bolts and reinstall them to the correct torque specifications. 
D)  recheck clutch pack clearance. 
A)  rotate the main shaft to attempt to get it to seat back down. 
B)  try to install without the main shaft support tool. 
C)  remove the bolts and reinstall them to the correct torque specifications. 
D)  recheck clutch pack clearance.

Exam 28: Allison 1000 and 2000 Series Transmissions

The Allison 1000, 2000, and 2400 series transmissions can be identified by the stamped metal tag on the body of the transmission.

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?

The 6-speed version of an Allison transmission has ________

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

What does the transmission use to attain the different gear ratios?

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?

What is the special tool required to remove the C4 snap ring from an Allison 1000/2000 transmission?

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

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?

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

The resistance value of the torque converter clutch solenoid is:

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

An Allison transmission comes in to the shop with ratio error codes for all gears. Tech A states that the transmission output shaft speed sensor could be faulty. Tech B states that the output shaft speed sensor can be checked with a DC voltmeter. Who is correct?

All of the following statements with respect to the speed sensors are true except:

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

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

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

The disassembly of an Allison 1000/2000 transmission is being discussed. Technician A says that the internal filter should be removed after the valve body is removed. Technician B says that a special tool is required to remove the electrical harness from the transmission case. Who is correct?

You are testing the solenoids on an Allison transmission and find the resistance of the trim solenoids to be 12.3 ohms. Tech A states that the solenoids need to be replaced. Tech B states that the resistance should be higher than 12.3 ohms. Who is correct?

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

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