SIL 06-WT-22 Rev A Other

Revisions to this document are noted by a

stripe in the left-hand margin
SUBJECT:
SIL 06-WT-22, Rev. A

April 14, 2026

Page 1 of 2
Addition of Outside Diameter (OD) Grooves to TransID (TIDA & TIDB) Torque Converter Clutch

(TCC) and Pressure Control Solenoid (PCS) Valves
MODELS AFFECTED:
3000 Series™ and 4000 Series™ — All Models
SERIAL NUMBERS AFFECTED:
TCC Valve — Beginning with:

Indianapolis 3000: 6511846584

Indianapolis 4000: 6610660038

Hungary 3000: 6520249099

Hungary 4000: 6620041490

PCS Valve — Beginning with:

Indianapolis 3000: 6511854021

Indianapolis 4000: 6610663500

Hungary 3000: 6520248051

Hungary 4000: 6620041676
Introduction

As a continuous product improvement, a change has been made to the 3000 and 4000 Series TCC Valve and

PCS Valve. The change includes the addition of OD grooves to each valve. Changes for both the TCC Valve

and PCS Valve are completely forward and backward compatible with existing transmissions. For information

regarding part numbers affected, see Table 1. For part identification, see Figure 1.
Service Procedures

All related service procedures remain unchanged.
Service Parts

Former TCC Valve and PCS Valve part numbers have been completely cancelled.
SB / SL8967EN
xi76657
Copyright © 2026 Allison Transmission, Inc. All Rights Reserved.
SIL 06-WT-22, Rev. A

April 14, 2026

Page 2 of 2
Parts Catalog

The affected Allison Transmission Parts Catalogs will show the related part number changes via the History

button.

Table 1. TCC Valve and PCS Valve Part Numbers

Part Name
Usage
Former P/N
Current P/N
TCC Valve
TCC/Lockup — All TIDA & TIDB
29542937
29566114
PCS Valve
PCS 1, 2, 3, 4 — All TIDA & TIDB
29542939
29566113

Added OD Grooves
FORMER

TCC VALVE

(P/N 29542937)
CURRENT

TCC VALVE

(P/N 29566114)
Identification Bands
FORMER

PCS VALVE

(P/N 29542939)
Added OD Grooves
CURRENT

PCS VALVE

(P/N 29566113)

7001303
Figure 1. TCC Valve and PCS Valve Identification

NOTE: Removal of identification bands from shank of former PCS Valve P/N 29542939 has no effect on

compatibility.

NOTE: Reduction in diameter of small end of former PCS Valve P/N 29542939 has no effect on

compatibility.
Copyright © 2026 Allison Transmission, Inc. All Rights Reserved.

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