Ownership Submission
FORM 3
 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
  TCG HOLDINGS LLC
 2. Date of Event Requiring Statement (Month/Day/Year)
03/14/2012		 3. Issuer Name and Ticker or Trading Symbol
Allison Transmission Holdings Inc [ALSN]
(Last)
(First)
(Middle)
C/O THE CARLYLE GROUP, 1001 PENNSYLVANIA AVE. NW, SUITE 220S		 4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director __X__ 10% Owner
_____ Officer (give title below) _____ Other (specify below)
5. If Amendment, Date Original Filed(Month/Day/Year)
(Street)

WASHINGTON, DC 20004		 6. Individual or Joint/Group Filing(Check Applicable Line)
___ Form filed by One Reporting Person
_X_ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Beneficially Owned
1.Title of Security
(Instr. 4)		 2. Amount of Securities Beneficially Owned
(Instr. 4)		 3. Ownership Form: Direct (D) or Indirect (I)
(Instr. 5)		 4. Nature of Indirect Beneficial Ownership
(Instr. 5)
Common Stock 90,356,250
I
See footnote (1)

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly. SEC 1473 (7-02)
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Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 4)		 2. Date Exercisable and Expiration Date
(Month/Day/Year)		 3. Title and Amount of Securities Underlying Derivative Security
(Instr. 4)		 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 5)		 6. Nature of Indirect Beneficial Ownership
(Instr. 5)
Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners

Reporting Owner Name / Address Relationships
Director 10% Owner Officer Other
TCG HOLDINGS LLC
C/O THE CARLYLE GROUP
1001 PENNSYLVANIA AVE. NW, SUITE 220S
WASHINGTON, DC 20004		     X    
TC Group, LLC
C/O THE CARLYLE GROUP
1001 PENNSYLVANIA AVE. NW, SUITE 220S
WASHINGTON, DC 20004		     X    
TC Group IV Managing GP, L.L.C.
C/O THE CARLYLE GROUP
1001 PENNSYLVANIA AVE. NW, SUITE 220S
WASHINGTON, DC 20004		     X    
Carlyle Partners IV AT Holdings, L.P.
C/O THE CARLYLE GROUP
1001 PENNSYLVANIA AVE. NW, SUITE 220S
WASHINGTON, DC 20004		     X    

Signatures

/s/ Jeremy W. Anderson, attorney-in-fact 03/14/2012
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 5(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) By Carlyle Partners IV AT Holdings, L.P. TC Group IV Managing GP, L.L.C. is the general partner of Carlyle Partners IV AT Holdings, L.P. TC Group, L.L.C. is the managing member of TC Group IV Managing GP, L.L.C. TCG Holdings, L.L.C. is the managing member of TC Group, L.L.C. Accordingly, each of TC Group IV Managing GP, L.L.C., TC Group, L.L.C. and TCG Holdings, L.L.C. may be deemed to be beneficial owners of shares of common stock owned of record by Carlyle Partners IV AT Holdings, L.P. TCG Holdings, L.L.C. is managed by a three-person managing board, and all board action relating to the voting or disposition of these shares requires approval of a majority of the board. William E. Conway, Jr., Daniel A. D'Aniello and David M. Rubenstein, as the managing members of TCG Holdings, L.L.C., may be deemed to share beneficial ownership of shares of common stock beneficially owned by TCG Holdings, L.L.C. Such individuals expressly disclaim any such beneficial ownership.
 
Remarks:
Exhibit List:
Exhibit 24 - Confirming Statement
Exhibit 99 - Joint Filer Information

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