content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001543492</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>Graziosi David S.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
          <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>126760</noOfUnitsSold>
        <aggregateMarketValue>9485450.80</aggregateMarketValue>
        <noOfUnitsOutstanding>87214197</noOfUnitsOutstanding>
        <approxSaleDate>02/26/2024</approxSaleDate>
        <securitiesExchangeName>NYSE</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <acquiredDate>02/26/2024</acquiredDate>
        <natureOfAcquisitionTransaction>Exercise of employee stock options</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>Allison Transmission Holdings Inc</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>126760</amountOfSecuritiesAcquired>
        <paymentDate>02/26/2024</paymentDate>
        <natureOfPayment>Broker assisted cashless exercise</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>David Graziosi</name>
          <address>
            <com:street1>ONE ALLISON WAY</com:street1>
            <com:city>Indianapolis</com:city>
            <com:stateOrCountry>IN</com:stateOrCountry>
            <com:zipCode>46222</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <saleDate>02/16/2024</saleDate>
        <amountOfSecuritiesSold>68066</amountOfSecuritiesSold>
        <grossProceeds>4834872.65</grossProceeds>
      </securitiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>David Graziosi</name>
          <address>
            <com:street1>ONE ALLISON WAY</com:street1>
            <com:city>Indianapolis</com:city>
            <com:stateOrCountry>IN</com:stateOrCountry>
            <com:zipCode>46222</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>Common Stock</securitiesClassTitle>
        <saleDate>02/20/2024</saleDate>
        <amountOfSecuritiesSold>76318</amountOfSecuritiesSold>
        <grossProceeds>5386043.87</grossProceeds>
      </securitiesSoldInPast3Months>
      <remarks>The transaction described under Securities to be Sold represents the same day exercise and sale of stock options granted to the reporting person to occur on or after 2/26/24, not a sale of existing share holdings. This Form 144 replaces in its entirety the Form 144 filed by the reporting person on February 21, 2024. The reporting person did not sell any shares pursuant to the Form 144 filed on February 21, 2024.</remarks>
      <noticeSignature>
        <noticeDate>02/26/2024</noticeDate>
        <signature>David Graziosi</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4517}]
text: 144
  0001543492
  XXXXXXXX
  LIVE
  0001411207
  Allison Transmission Holdings Inc
  001-35456
  ONE ALLISON WAY
  Indianapolis
  IN
  46222
  (317) 242-5000
  Graziosi David S.
  Officer
  Director
  Common Stock
  Merrill Lynch
  225 Liberty St
  Floor 37
  New York
  NY
  10281
  126760
  9485450.80
  87214197
  02/26/2024
  NYSE
  Common Stock
  02/26/2024
  Exercise of employee stock options
  Allison Transmission Holdings Inc
  N
  126760
  02/26/2024
  Broker assisted cashless exercise
  N
  David Graziosi
  ONE ALLISON WAY
  Indianapolis
  IN
  46222
  Common Stock
  02/16/2024
  68066
  4834872.65
  David Graziosi
  ONE ALLISON WAY
  Indianapolis
  IN
  46222
  Common Stock
  02/20/2024
  76318
  5386043.87
  The transaction described under Securities to be Sold represents the same day exercise and sale of stock options granted to the reporting person to occur on or after 2/26/24, not a sale of existing share holdings. This Form 144 replaces in its entirety the Form 144 filed by the reporting person on February 21, 2024. The reporting person did not sell any shares pursuant to the Form 144 filed on February 21, 2024.
  02/26/2024
  David Graziosi