Revisions to this document are noted
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SUBJECT:

2020FA01, Rev. B
September 16, 2020
Product Code(s): 65, 66
Page 1 of 12

Special Coverage for TIDB Main Regulator Valve P/N 29563501 – Reactive

MODELS AFFECTED:

3000, 4000 Series, B200™, B300™, B3400 xFE™, B400™, B500™, T200™, T300™,
T400™, T500™ Models

VOCATIONS AFFECTED:

All Vocations

Introduction:
Allison Transmission, Inc. has identified a potential concern with the TIDB Main Regulator Valve P/N 29563501.
The concern is related to a manufacturing burr on the valve OD (refer to Figure 1 and Figure 2 in this document or
SIL 01-WT-20 for additional detail). As a Global Customer Satisfaction initiative, Allison Transmission, Inc. will
support the reactive repair of units with symptoms attributable to the subject part in the serial number ranges
identified in Table 1 for five years from the in-service date of the vehicle. This Field Action does not cover
transmission service work unrelated to the symptoms described within.
NOTE: The purpose of this Field Action is to provide a reactive repair (after a failure has occurred)
of the covered condition. Refer to the following instructions to identify affected transmissions, obtain
authorization to perform the repair, and submit the proper warranty claim.
The following symptoms may be present with a defective P/N 29563501 TIDB Main Regulator Valve:
• Harsh upshifts when C2 clutch is oncoming (6 speed: 3-4 upshift, 7 speed: 3-4 or 4-5 upshift)
• Premature P088A Transmission Filter Maintenance Alert, and/or P088B Transmission Filter Maintenance
Required DTCs
• Premature P2789 Transmission Clutch Life Expired (Clutch Adaptive Learning at Limit) DTC
• Premature TRANSHEALTH Transmission Health Monitor failure

MC / FA8655EN

5251027

Copyright © 2020 Allison Transmission, Inc. All Rights Reserved.

2020FA01, Rev. B
September 16, 2020
Product Code(s): 65, 66
Page 2 of 12
Table 1. Affected Serial Number Range, Models and Vocations
Global Customer
Satisfaction Initiative
TIDB Main Regulator
Valve
Product Code

Affected Serial Number
(S/N) Range

Affected Transmission Models

Affected Vocations

Starts with S/N 651

6511680892 6511697317

3000 Series™, B200™, B300™,
B400™, T200™, T300™

All

Starts with S/N 651

6511687929 6511696694

3700

All

Starts with S/N 652

6520222682 6520223344

3000 Series™, B300™,
T200™, T300™

All

Starts with S/N 661

6610578391 6610586710

4000 Series™, B500™, T400™

All

Starts with S/N 661

6610578499 6610586395

4700/4800

All

Starts with S/N 662

6620036701 6620036833

4000 Series™, B500™, T500™

All

Starts with S/N 662

6620036703 6620036815

4700/4800

All

NOTE: There are a number of transmissions within the affected serial number ranges that were contained
and certified at the factory for the subject condition. Those serial numbers are ineligible for this Field
Action. The Field Action Authorization Tool will not return an authorization number for those units.

NOTE: All 6-speed serial number ranges eligible for this Field Action span implementation of the current
P/N 29562588 Filter Life Indicator (FLI) Spring. The parts lists in this Field Action letter show replacement
of the FLI Spring “As-Required”. If former P/N 29546549 (blue color) is present, replace with current P/N
29562588 (red color) as-required. Refer to Table 2 or SIL 32-WT-19 for implementation serial numbers.

NOTE: Prior to performing work, please read SIL 01-WT-20 related to inspection of the Main Regulator
Valve for the subject manufacturing burr condition.

Table 2. P/N 29562588 Filter Life Indicator (FLI) Spring Implementation
Product Code

P/N 29562588 Implementation Serial Number

Starts with S/N 651

6511686527

Starts with S/N 652

6520222919

Starts with S/N 661

6610581945

Starts with S/N 662

6620036741

Field Action Transmission Identification:
Prior to the repair of a suspect transmission, verify that the Field Action repair has NOT already been performed.
Login to https://sap.allisontransmission.com/extranet/fieldactions. Enter the transmission serial number, vehicle

Copyright © 2020 Allison Transmission, Inc. All Rights Reserved.

2020FA01, Rev. B
September 16, 2020
Product Code(s): 65, 66
Page 3 of 12
vocation code, and request an authorization. If you receive an authorization number, then this is confirmation that
the Field Action has NOT been performed. If the Field Action has NOT been performed, proceed with the repair.
Include the authorization number in the warranty claim narrative prior to submitting the claim. If you are unable
to obtain an authorization number, and you believe the transmission qualifies for the Field Action based on the
serial number range, contact the Allison Technical Assistance Center (TAC) at 1-800-252-5283 or 317-242-0700 or
E-mail: Allison[email protected].

Allison Service Outlet Field Action Responsibility:
When a Customer has a vehicle in the affected S/N range that displays the symptoms previously listed, the service
outlet shall take the following steps to support the customer:
1. Confirm the transmission is within the affected S/N range per Table 1.
2. Verify the transmission nameplate does not have the “X” Identification Mark indicating Field Action service
work has already been performed (refer to Figure 3).
3. Request a 2020FA01 authorization number for the transmission serial number to be repaired.
4. Verify the required service parts shown in Table 3, Table 4, Table 5, or Table 6 are in inventory to support the
required service work.
• Use Table 3 to support a Product Code 65 3000 Series™ 6-speed unit
• Use Table 4 to support a Product Code 65 3000 Series™ 7-speed unit
• Use Table 5 to support a Product Code 66 4000 Series™ 6-speed unit
• Use Table 6 to support a Product Code 66 4000 Series™ 7-speed unit
5. Replace parts listed in Table 3, Table 4, Table 5, or Table 6 per the Service Manual SM4013 or SM4014
Control Module Overhaul procedures.
NOTE: Prior to re-using the PS1 Switch Assembly or PS2 Switch Assembly, closely inspect the O-ring of
each switch for damage. If either O-ring is questionable, replace the part.

NOTE: Closely inspect the Main Regulator Valve P/N 29563501 for the presence of a manufacturing burr
shown in Figure 1 and Figure 2 below. See SIL 01-WT-20 for additional clarification.

Figure 1.

Copyright © 2020 Allison Transmission, Inc. All Rights Reserved.

2020FA01, Rev. B
September 16, 2020
Product Code(s): 65, 66
Page 4 of 12

Figure 2.
6. Use the Allison DOC® Action Request command Clear All Shift Adaptive Data to force Fast Adapted shifts.
NOTE: The Clear All Shift Adaptive Data Action Request forces the TCM to use the Fast Adaptive
algorithm to adapt shifts.
7. Fill transmission with the same type of fluid that was drained. Reset Fluid Life Monitor as-required.
8. Stamp or etch an “X” identification mark into the transmission nameplate in the location shown in Figure 3.

Copyright © 2020 Allison Transmission, Inc. All Rights Reserved.

2020FA01, Rev. B
September 16, 2020
Product Code(s): 65, 66
Page 5 of 12

Figure 3. Identification Mark
9. File AWAARE claim per Table 7, Table 8, Table 9, or Table 10.

Required Service Parts:
The following tables provide the required service parts for this Global Customer Satisfaction Field Action 2020FA01
initiative.
Table 3. Product Code 65 – 3000 Series™, B200™, B300™, B400™, T200™, T300™ Models
Mandatory/AsRequired

Part Number

Part Name

Quantity

Mandatory

23019664

Drain Plug O-ring

1

Mandatory

23046376

Seal, Face

3

Mandatory

29503283

Gasket, Case

1

Mandatory

29503382

O-ring, 14.0 mm ID

1

Mandatory

29503384

O-ring, 18.8 mm ID

1

Mandatory

29507437

Filter Cover O-ring

2

Mandatory

29512863

O-ring, Standoff, 47.2 mm ID

1

Mandatory

29524449

Filter Cover Gasket

2

Mandatory

29535518

O-ring, 13.0 mm ID

6

Mandatory

29537066

Gasket, Suction Filter

1

Mandatory

29542976

O-ring, 10.5 mm ID

6

Mandatory

29542991

Seal, Face

1

Mandatory

29548953

Filter Cover O-ring

2

As-Required

29549658

Switch Assembly, Pressure (PS2)

1

As-Required

29552364

Switch Assembly, Pressure (PS1)

1

Mandatory

29557154

Body, Main Control Valve

1

Mandatory

29557345

Gasket, Channel Plate

1

As-Required

29562588

FLI Spring

1

Mandatory

29563501

Valve, Main Regulator

1

Copyright © 2020 Allison Transmission, Inc. All Rights Reserved.

2020FA01, Rev. B
September 16, 2020
Product Code(s): 65, 66
Page 6 of 12
Table 4. Product Code 65 – 3700 Model
Mandatory/AsRequired

Part Number

Part Name

Quantity

Mandatory

23019664

Drain Plug O-ring

1

Mandatory

23046376

Seal, Face

3

Mandatory

29503283

Gasket, Case

1

Mandatory

29503382

O-ring, 14.0 mm ID

1

Mandatory

29503384

O-ring, 18.8 mm ID

1

Mandatory

29507437

Filter Cover O-ring

2

Mandatory

29512863

O-ring, Standoff, 47.2 mm ID

1

Mandatory

29524449

Filter Cover Gasket

2

Mandatory

29535518

O-ring, 13.0 mm ID

6

Mandatory

29537066

Gasket, Suction Filter

1

Mandatory

29542976

O-ring, 10.5 mm ID

6

Mandatory

29542991

Seal, Face

1

Mandatory

29548953

Filter Cover O-ring

2

As-Required

29552364

Switch Assembly, Pressure (PS1)

1

Mandatory

29557155

Body, Main Control Valve

1

Mandatory

29557346

Gasket, Channel Plate

1

Mandatory

29563501

Valve, Main Regulator

1

Copyright © 2020 Allison Transmission, Inc. All Rights Reserved.

2020FA01, Rev. B
September 16, 2020
Product Code(s): 65, 66
Page 7 of 12