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    <headerData>
      <submissionType>144</submissionType>
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        <filer>
          <filerCredentials>
            <cik>0001195347</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0001411207</issuerCik>
        <issuerName>Allison Transmission Holdings Inc</issuerName>
        <secFileNumber>001-35456</secFileNumber>
        <issuerAddress>
          <com:street1>ONE ALLISON WAY</com:street1>
          <com:city>Indianapolis</com:city>
          <com:stateOrCountry>IN</com:stateOrCountry>
          <com:zipCode>46222</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>(317) 242-5000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>ASKREN STANLEY A</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Director</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>Merrill Lynch</name>
          <address>
            <com:street1>225 Liberty St</com:street1>
            <com:street2>Floor 37</com:street2>
            <com:city>New York</com:city>
            <com:stateOrCountry>NY</com:stateOrCountry>
            <com:zipCode>10281</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>32463</noOfUnitsSold>
        <aggregateMarketValue>1592930.04</aggregateMarketValue>
        <noOfUnitsOutstanding>91055228</noOfUnitsOutstanding>
        <approxSaleDate>05/22/2023</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>03/31/2016</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>463</amountOfSecuritiesAcquired>
        <paymentDate>03/31/2016</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/12/2016</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>620</amountOfSecuritiesAcquired>
        <paymentDate>05/12/2016</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>08/12/2016</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>663</amountOfSecuritiesAcquired>
        <paymentDate>08/12/2016</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>11/11/2016</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>603</amountOfSecuritiesAcquired>
        <paymentDate>11/11/2016</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/10/2017</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>497</amountOfSecuritiesAcquired>
        <paymentDate>02/10/2017</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/11/2017</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>4187</amountOfSecuritiesAcquired>
        <paymentDate>05/11/2017</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>08/11/2017</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>512</amountOfSecuritiesAcquired>
        <paymentDate>08/11/2017</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>11/10/2017</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>433</amountOfSecuritiesAcquired>
        <paymentDate>11/10/2017</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/12/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>450</amountOfSecuritiesAcquired>
        <paymentDate>02/12/2018</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/10/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3679</amountOfSecuritiesAcquired>
        <paymentDate>05/10/2018</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>08/10/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>409</amountOfSecuritiesAcquired>
        <paymentDate>08/10/2018</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>11/12/2018</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>406</amountOfSecuritiesAcquired>
        <paymentDate>11/12/2018</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/11/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>398</amountOfSecuritiesAcquired>
        <paymentDate>02/11/2019</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/08/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>413</amountOfSecuritiesAcquired>
        <paymentDate>05/08/2019</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/09/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2895</amountOfSecuritiesAcquired>
        <paymentDate>05/09/2019</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>08/09/2019</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>491</amountOfSecuritiesAcquired>
        <paymentDate>08/09/2019</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/04/2022</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>2985</amountOfSecuritiesAcquired>
        <paymentDate>05/04/2022</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>05/03/2023</acquiredDate>
        <natureOfAcquisitionTransaction>Vesting of restricted stock unit award</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>12359</amountOfSecuritiesAcquired>
        <paymentDate>05/03/2023</paymentDate>
        <natureOfPayment>Granted as part of issuer equity compensation plan</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>Y</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>05/22/2023</noticeDate>
        <signature>Stanley Askren</signature>
      </noticeSignature>
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text: 144
  0001195347
  XXXXXXXX
  LIVE
  0001411207
  Allison Transmission Holdings Inc
  001-35456
  ONE ALLISON WAY
  Indianapolis
  IN
  46222
  (317) 242-5000
  ASKREN STANLEY A
  Director
  Common Stock
  Merrill Lynch
  225 Liberty St
  Floor 37
  New York
  NY
  10281
  32463
  1592930.04
  91055228
  05/22/2023
  NYSE
  Common Stock
  03/31/2016
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  463
  03/31/2016
  Granted as part of issuer equity compensation plan
  Common Stock
  05/12/2016
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  620
  05/12/2016
  Granted as part of issuer equity compensation plan
  Common Stock
  08/12/2016
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  663
  08/12/2016
  Granted as part of issuer equity compensation plan
  Common Stock
  11/11/2016
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  603
  11/11/2016
  Granted as part of issuer equity compensation plan
  Common Stock
  02/10/2017
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  497
  02/10/2017
  Granted as part of issuer equity compensation plan
  Common Stock
  05/11/2017
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  4187
  05/11/2017
  Granted as part of issuer equity compensation plan
  Common Stock
  08/11/2017
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  512
  08/11/2017
  Granted as part of issuer equity compensation plan
  Common Stock
  11/10/2017
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  433
  11/10/2017
  Granted as part of issuer equity compensation plan
  Common Stock
  02/12/2018
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  450
  02/12/2018
  Granted as part of issuer equity compensation plan
  Common Stock
  05/10/2018
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  3679
  05/10/2018
  Granted as part of issuer equity compensation plan
  Common Stock
  08/10/2018
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  409
  08/10/2018
  Granted as part of issuer equity compensation plan
  Common Stock
  11/12/2018
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  406
  11/12/2018
  Granted as part of issuer equity compensation plan
  Common Stock
  02/11/2019
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  398
  02/11/2019
  Granted as part of issuer equity compensation plan
  Common Stock
  05/08/2019
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  413
  05/08/2019
  Granted as part of issuer equity compensation plan
  Common Stock
  05/09/2019
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  2895
  05/09/2019
  Granted as part of issuer equity compensation plan
  Common Stock
  08/09/2019
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  491
  08/09/2019
  Granted as part of issuer equity compensation plan
  Common Stock
  05/04/2022
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  2985
  05/04/2022
  Granted as part of issuer equity compensation plan
  Common Stock
  05/03/2023
  Vesting of restricted stock unit award
  Allison Transmission Holdings Inc
  N
  12359
  05/03/2023
  Granted as part of issuer equity compensation plan
  Y
  05/22/2023
  Stanley Askren