SIL 11-TR-22
July 25, 2022
Page 1 of 40
SUBJECT:

Introduction of 9832 Rapid Warmup and Output Brake Features

MODELS AFFECTED:

9832 OFSD, OFS and OFSI

SERIAL NUMBERS AFFECTED:

Beginning with S/N 4320014057

Introduction:
Effective April 15th, 2022, all 9832 OFSD, OFS and OFSI transmissions will be produced with new components that
allow the transmission to be capable of an output brake function and a rapid fluid warmup function. The hardware
changes include a new main valve body, new trimmer valve body, two additional solenoids and a temperature
sensor to monitor oil temperature in the torque converter. Transmissions produced after the effectivity date will
contain all the necessary hardware to utilize the new features, but availability of these features is determined by
the Transmission Control Module (TCM) calibration.

Description:
Beginning with software level H212 for Commercial Electronic Controls 5 (CEC5), the Rapid Warmup and Output
Brake functions were made available to 9832 OFS model calibrations. The warmup and brake features are
Input/Output (I/O) functions that can be integrated to activate by switch and hardwire to the TCM or by a J1939
message provided by a rig controller. Details of each function are described below.
Output Brake Function:
The brake function uses two of the transmission’s stationary range clutches to lock the output shaft from rotation.
During brake operation, pressure to the splitter clutches is cut off to allow the turbine to rotate freely and maintain
Neutral. The brake function request is enabled when input functions CT1 and CT2 are switched on simultaneously
or the J1939 brake function request message is sent to the TCM.
The brake function will automatically deactivate when a forward operating range is selected, even if the brake
function request is still enabled.
The following parameters must be met to activate the Output Brake function. If the function is commanded but one
or more of the requirements are not met, the output brake will disengage until all requirements are met.
• Transmission is in N (Neutral)
• Engine is running and engine speed is between 550-1150 rpm
• Output speed is below 400 rpm

BK / SL8985EN

6179007

Copyright © 2022 Allison Transmission, Inc. All Rights Reserved.

SIL 11-TR-22
July 25, 2022
Page 2 of 40
• Transmission sump oil temperature is above -15° C (5° F)
• CT1 and CT2 input functions are switched on simultaneously (if hardwired)
NOTE: To protect the transmission from damage, the Output Brake will disengage if the engine speed
goes above 1260 rpm or engine load exceeds 85% while the brake function is commanded on.
Rapid Warmup Function:
The warmup function uses two of the transmission’s stationary range clutches and one rotating clutch. This
combination of clutches locks all transmission shafts from rotation, creating a stall condition within the torque
converter. Stalling the torque converter causes the engine’s rotational energy to heat the transmission fluid. The
fluid heated in the torque converter circulates throughout the transmission and reduces the amount of time needed
to reach normal operating temperature. The warmup function request is enabled when input function CU is
switched on or the J1939 Rapid Warmup function request message is being sent to the TCM.
The warmup function will automatically deactivate when the transmission sump temperature reaches a calibrated
value. The calibrated value for automatic deactivation can be set at a customer’s desired value between 10-90°
C (50-194° F). The default temperature for automatic deactivation is 60° C (140° F). If the warmup function
I/O request remains active, the TCM will automatically reactivate the warmup function if transmission sump
temperature falls sufficiently below the calibrated value.
The following parameters must be met to activate the Rapid Warmup function. If the function is commanded but
one or more of the requirements are not met, Rapid Warmup will be disengaged until all requirements are met.
• Transmission is in N (Neutral) or B (Brake) when Rapid Warmup is requested
• Engine is running and engine speed is between 550-1150 rpm
• Transmission sump oil temperature is above -15° C (5° F) and below the calibrated deactivation temperature
• Transmission converter oil temperature remains between 80-110° C (176-230° F)
NOTE: To protect the transmission from damage, the Output Brake will disengage if the engine speed
goes above 1260 rpm or engine load exceeds 85% while the brake function is commanded on.

Copyright © 2022 Allison Transmission, Inc. All Rights Reserved.

SIL 11-TR-22
July 25, 2022
Page 3 of 40

New Diagnostic Trouble Codes (DTCs)
Refer to Table 1 for a list of new Diagnostic Trouble Codes (DTCs) that have been added to support the Rapid
Warmup and Output Brake features. Troubleshooting steps for these new DTCs can be found in Appendix B
of this SIL.
Table 1. New DTCs for Rapid Warmup and Output Brake
DTC

SPN

FMI

Description

CHECK
TRANS

Inhibited Operation Description

P0504

11752

7

Transmission Output Brake
Switch Correlation

Yes

Inhibited Operation – Output Brake
remains in last valid state

C0082

11752

31

Transmission Output Brake
Range Verification

Yes

Inhibited Operation DNS – LTN for stationary

P274F

3823

15

Transmission Converter
Temperature Sensor Over
Temperature Condition

Yes

No Inhibited Operation

P274D

3823

3

Transmission Converter
Temperature Sensor Circuit High

Yes

Use default converter temperature
value of 0° C (32° F)

P274C

3823

4

Transmission Converter
Temperature Sensor Circuit Low

Yes

Use default converter temperature
value of 0° C (32° F)

Allison DOC® Updates:
Beginning with version 2021.5, Allison DOC has been updated to display parameters related to Rapid Warmup and
Output Brake when these features are enabled in the calibration. The new parameters include Torque Converter
Outlet Fluid Temperature, Torque Converter Outlet Temperature Sensor Resistance, Input Signal State and Input
Function State for Output Brake and Rapid Warmup. These parameters are found on the Data Monitor screen in
Allison DOC. It is also possible to plot these new parameters using the Strip Chart screen. Refer to Figure 1.

Figure 1. Updated Allison DOC Data Monitor Parameters and Input Parameters

Parts Information:
Updated components related to these new features are described in Table 2 and Table 3. All current components
within each engineering group are fully interchangeable backwards when used together, but current and former
components cannot be inter-mixed. It is possible to update a former 9832 to be capable of the Rapid Warmup and
Output Brake features by updating all parts in both engineering groups.
Copyright © 2022 Allison Transmission, Inc. All Rights Reserved.

SIL 11-TR-22
July 25, 2022
Page 4 of 40
Table 2. 9832 Rapid Warmup and Output Brake Main Control Valve Group Parts Changes
Item

Part Number
(S/N 4320014057 and
Forward)

Qty.

Part Number
(S/N 4320014056 and
Backward)

Description

Qty.

1

29563014

1

29528544

1

Body Assembly, Main Control Valve

2

29563997

1

6880179

1

Plate Assembly, Solenoid Mounting

3

29562849

1

23016164

1

Plate, Oil Transfer

4

29563021

1

29543955

1

Gasket, Separator Plate to Valve Body

5

29565138

1

29544666

1

Separator Plate, Lock-To-Neutral

6

29563023

1

29543954

1

Gasket, Channel Plate to Separator Plate

7

29563018

1

29527361

1

Body, Trimmer Valve

8

29562844

1

23010381

1

Gasket, Trimmer Cover

9

29562843

1

23010378

1

Cover, Trimmer Valve

10

6832304

1

N/A

—

Spring, Splitter Cutoff Valve

11

29563019

1

N/A

—

Valve, Splitter Cutoff

12

186647

10

186647

8

Bolt, Trimmer Cover

13

103339

10

103339

8

Washer, Trimmer Cover Bolt

14

29570499

3

179851

3

Bolt, Valve Body

15

29563016

1

23013236

1

Gasket, Trimmer Body to Valve Body

16

23019734

7

23019734

5

Solenoid, 12V

17

454813

10

454813

8

Bolt, Solenoid Mounting

18

103339

10

103339

8

Washer, Solenoid Mounting Bolt

19

29564287 OR
29568701

1

29544165 OR
29547674

1

Harness, Main Control Valve Internal OR
Harness, Main Control Valve Internal,
Stainless-Steel Connector

20

6832304

5

6832304

4

Spring, Shift Valve

21

N/A

—

29544178

1

Plate, Solenoid Blocking

NOTE: All former 9832 valve body parts will continue to be available from the Parts Distribution Center
(PDC) for service needs.

Table 3. 9832 Rapid Warmup and Output Brake Converter Housing Group Parts Changes
Item

Part Number
(S/N 4320014057 and
Forward)

Qty.

Part Number
(S/N 4320014056 and
Backward)

Description

Qty.

1

29563477

1

29537425

1

Converter Housing Assembly

2

15326309

1

N/A

—

Temperature Sensor

3

29533980

1

N/A

—

Bracket, Temperature Sensor

4

29542098

1

N/A

—

Screw, Button Head

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SIL 11-TR-22
July 25, 2022
Page 5 of 40