POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby
constitutes and appoints each of Eric C. Scroggins and
Preston B. Ray or either of them signing singly, and
with full power of substitution, the undersigned's true
and lawful attorney-in-fact to:

(1) prepare, execute in the undersigned's name and on
the undersigned's behalf, and submit to the U.S.
Securities and Exchange Commission (the "SEC") a Form
ID, including amendments thereto, and any other documents
necessary or appropriate to obtain codes and passwords
enabling the undersigned to make electronic filings with
the SEC of reports required by Section 16(a) of the
Securities Exchange Act of 1934 or any rule or regulation
of the SEC;

(2) execute for and on behalf of the undersigned, in the
undersigned's capacity as an officer and/or director of
Allison Transmission Holdings, Inc. (the "Company"),
Forms 3, 4, and 5 in accordance with Section 16(a) of
the Securities Exchange Act of 1934 and the rules
thereunder;

(3) do and perform any and all acts for and on behalf of
the undersigned which may be necessary or desirable to
complete and execute any such Form 3, 4, or 5, complete
and execute any amendment or amendments thereto, and
timely file such form with the SEC and any stock exchange
or similar authority; and

(4) take any other action of any type whatsoever in
connection with the foregoing which, in the opinion
of such attorney-in-fact, may be of benefit to, in the
best interest of, or legally required by, the undersigned,
it being understood that the documents executed by such
attorney-in-fact on behalf of the undersigned pursuant
to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact
may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact
full power and authority to do and perform any and every
act and thing whatsoever requisite, necessary, or proper to
be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as
the undersigned might or could do if personally present,
with full power of substitution or revocation, hereby
ratifying and confirming all that such attorney-in-fact,
or such attorney-in-fact's substitute or substitutes,
shall lawfully do or cause to be done by virtue of this
power of attorney and the rights and powers herein granted.
The undersigned acknowledges that the foregoing
attorneys-in-fact, in serving in such capacity at the
request of the undersigned, are not assuming, nor is the
Company assuming, any of the undersigned's responsibilities
to comply with Section 16 of the Securities Exchange Act
of 1934.

This Power of Attorney shall remain in full force and
effect until the undersigned is no longer required to
file Forms 3, 4, and 5 with respect to the undersigned's
holdings of and transactions in securities issued by the
Company, unless earlier revoked by the undersigned in a
signed writing delivered to the foregoing
attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this
Power of Attorney to be executed as of this 27th day
of July, 2023.


/s/ Richard Lavin
Signature

Richard Lavin
Printed Name