Question 1

The Allison transmission utilizes three speed sensors.

Accepted Answer

A) True 
 B)False

Question 2

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.

Question 3

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

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 4

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

Accepted Answer

A)  a bore brush. 
B)  a drill. 
C)  a solvent tank. 
D)  a scrubber. 
A)  a bore brush. 
B)  a drill. 
C)  a solvent tank. 
D)  a scrubber.

Question 5

An Allison 1000/2000 series transmission pump is being rebuilt. Technician A says that all three stator support shafts should be replaced. Technician B says that the front pump bushing can be reused if it appears OK. Who is correct?

Accepted Answer

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

Question 6

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 7

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 8

Technician A says that during a shift, one of the two clutches from the previous gear will remain engaged. Technician B says that when shifting, one of the new gear clutches will engage. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both technicians 
D)  Neither technician 
A)  Technician A 
B)  Technician B 
C)  Both technicians 
D)  Neither technician

Question 9

A vehicle with an Allison transmission comes in with slipping 4th, 5th and 6th gears. Tech A states that the problem could be a burned C1 clutch. Tech B states that the problem could be a bad shift solenoid. 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

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

Accepted Answer

A)  Torque converter clutch 
B)  Trim B 
C)  Shift Solenoid E 
D)  Trim A 
A)  Torque converter clutch 
B)  Trim B 
C)  Shift Solenoid E 
D)  Trim A

Question 11

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 12

Technician A says that during a shift, one of the two clutches from the previous gear will remain engaged. Technician B says that when shifting, one of the new gear clutches will engage. Who is correct?

Accepted Answer

A)  Technician A 
B)  Technician B 
C)  Both technicians 
D)  Neither technician 
A)  Technician A 
B)  Technician B 
C)  Both technicians 
D)  Neither technician

Question 13

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 14

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

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 15

The internal filter needs to be changed:

Accepted Answer

A)  whenever the external filter is changed. 
B)  during every service. 
C)  during every alternate transmission service. 
D)  during the first transmission service. 
A)  whenever the external filter is changed. 
B)  during every service. 
C)  during every alternate transmission service. 
D)  during the first transmission service.

Question 16

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

Accepted Answer

A)  One 
B)  Two 
C)  Three 
D)  Four 
A)  One 
B)  Two 
C)  Three 
D)  Four

Question 17

Which of the following statements is NOT true regarding the Allison transmissions?

Accepted Answer

A)  The transmission uses no brake bands, one-way rollers, or sprags. 
B)  The transmission utilizes five clutches for all forward speeds as well as reverse. 
C)  The transmission requires different rebuild kits. 
D)  The 1000, 2000, and 2400 versions of the transmission are all relatively similar. 
A)  The transmission uses no brake bands, one-way rollers, or sprags. 
B)  The transmission utilizes five clutches for all forward speeds as well as reverse. 
C)  The transmission requires different rebuild kits. 
D)  The 1000, 2000, and 2400 versions of the transmission are all relatively similar.

Question 18

Which of the following statements is NOT true regarding the Allison transmissions?

Accepted Answer

A)  The transmission uses no brake bands, one-way rollers, or sprags. 
B)  The transmission utilizes five clutches for all forward speeds as well as reverse. 
C)  The transmission requires different rebuild kits. 
D)  The 1000, 2000, and 2400 versions of the transmission are all relatively similar. 
A)  The transmission uses no brake bands, one-way rollers, or sprags. 
B)  The transmission utilizes five clutches for all forward speeds as well as reverse. 
C)  The transmission requires different rebuild kits. 
D)  The 1000, 2000, and 2400 versions of the transmission are all relatively similar.

Question 19

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

Accepted Answer

A)  37 ft-lb (50 N·m). 
B)  20 ft-lb (27 N·m). 
C)  32 ft-lb (43 N·m). 
D)  41 ft-lb (56 N·m). 
A)  37 ft-lb (50 N·m). 
B)  20 ft-lb (27 N·m). 
C)  32 ft-lb (43 N·m). 
D)  41 ft-lb (56 N·m).

Question 20

When rebuilding the C1 and C2 clutch housing on an Allison 1000/2000 transmission, how many clutch pistons are included in the assembly?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Exam 28: Allison 1000 and 2000 Series Transmissions

The Allison transmission utilizes three speed sensors.

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

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?

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

An Allison 1000/2000 series transmission pump is being rebuilt. Technician A says that all three stator support shafts should be replaced. Technician B says that the front pump bushing can be reused if it appears OK. Who is correct?

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

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?

Technician A says that during a shift, one of the two clutches from the previous gear will remain engaged. Technician B says that when shifting, one of the new gear clutches will engage. Who is correct?

A vehicle with an Allison transmission comes in with slipping 4th, 5th and 6th gears. Tech A states that the problem could be a burned C1 clutch. Tech B states that the problem could be a bad shift solenoid. Who is correct?

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

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

Technician A says that during a shift, one of the two clutches from the previous gear will remain engaged. Technician B says that when shifting, one of the new gear clutches will engage. Who is correct?

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

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?

The internal filter needs to be changed:

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

Which of the following statements is NOT true regarding the Allison transmissions?

Which of the following statements is NOT true regarding the Allison transmissions?

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

When rebuilding the C1 and C2 clutch housing on an Allison 1000/2000 transmission, how many clutch pistons are included in the assembly?

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Automatic Transmission Fundamentals

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Torque Converter Principles

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Transmission Removal

Transmission Disassembly

Hydraulic System Rebuilding

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Valve Body and Electric Service

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