<SUBMISSION>
<ACCESSION-NUMBER>0000899243-17-009877
<TYPE>4
<PUBLIC-DOCUMENT-COUNT>1
<PERIOD>20170406
<FILING-DATE>20170410
<ISSUER>
<COMPANY-DATA>
<CONFORMED-NAME>Metaldyne Performance Group Inc.
<CIK>0001616817
<ASSIGNED-SIC>3714
<IRS-NUMBER>471420222
<STATE-OF-INCORPORATION>DE
<FISCAL-YEAR-END>1231
</COMPANY-DATA>
<BUSINESS-ADDRESS>
<STREET1>ONE TOWNE SQUARE
<STREET2>SUITE 550
<CITY>SOUTHFIELD
<STATE>MI
<ZIP>48076
<PHONE>248-727-1800
</BUSINESS-ADDRESS>
<MAIL-ADDRESS>
<STREET1>ONE TOWNE SQUARE
<STREET2>SUITE 550
<CITY>SOUTHFIELD
<STATE>MI
<ZIP>48076
</MAIL-ADDRESS>
</ISSUER>
<REPORTING-OWNER>
<OWNER-DATA>
<CONFORMED-NAME>Jackson William C
<CIK>0001522750
</OWNER-DATA>
<FILING-VALUES>
<FORM-TYPE>4
<ACT>34
<FILE-NUMBER>001-36774
<FILM-NUMBER>17754354
</FILING-VALUES>
<MAIL-ADDRESS>
<STREET1>5757 N. GREEN BAY AVENUE
<CITY>MILWAUKEE
<STATE>WI
<ZIP>53209
</MAIL-ADDRESS>
</REPORTING-OWNER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc4.xml
<DESCRIPTION>FORM 4 SUBMISSION
<TEXT>
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<ownershipDocument>

    <schemaVersion>X0306</schemaVersion>

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    <periodOfReport>2017-04-06</periodOfReport>

    <notSubjectToSection16>1</notSubjectToSection16>

    <issuer>
        <issuerCik>0001616817</issuerCik>
        <issuerName>Metaldyne Performance Group Inc.</issuerName>
        <issuerTradingSymbol>MPG</issuerTradingSymbol>
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            <rptOwnerName>Jackson William C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
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            <rptOwnerStreet2>P.O. BOX 591</rptOwnerStreet2>
            <rptOwnerCity>MILWAUKEE</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>53209</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
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            <transactionTimeliness>
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            <transactionDate>
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            <transactionTimeliness>
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            <transactionAmounts>
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                <transactionPricePerShare>
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    <derivativeTable>
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            <securityTitle>
                <value>Stock Options</value>
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            <conversionOrExercisePrice>
                <value>5.40</value>
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            <transactionDate>
                <value>2017-04-06</value>
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                <footnoteId id="F6"/>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>10695</value>
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                <transactionPricePerShare>
                    <value>16.54</value>
                    <footnoteId id="F6"/>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <exerciseDate>
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            <expirationDate>
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            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
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                <transactionCode>D</transactionCode>
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                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>1070</value>
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                <transactionPricePerShare>
                    <value>1.94</value>
                    <footnoteId id="F6"/>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
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            <exerciseDate>
                <footnoteId id="F5"/>
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            <expirationDate>
                <value>2024-08-04</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1070</value>
                </underlyingSecurityShares>
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                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
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                    <value>D</value>
                </directOrIndirectOwnership>
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        </derivativeTransaction>
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    <footnotes>
        <footnote id="F1">Reflects disposition in connection with the consummation of the transactions contemplated by the Agreement and Plan of Merger, dated as of November 3, 2016 (the &quot;Merger Agreement&quot;), by and among the Issuer, American Axle &amp; Manufacturing Holdings, Inc. (&quot;AAM&quot;) and Alpha SPV I, Inc., a wholly-owned subsidiary of AAM (&quot;Merger Sub&quot;), pursuant to which Merger Sub merged with and into the Issuer (the &quot;Merger&quot;), with the Issuer surviving as a wholly-owned subsidiary of AAM and each share of Common Stock was exchanged for $13.50 in cash (the &quot;Cash Consideration&quot;) and 0.5 of a share of common stock of AAM (the &quot;Share Consideration&quot; and, together with the Cash Consideration, the &quot;Merger Consideration&quot;). The closing price of a share of Common Stock on April 5, 2017 (the last trading day prior to the effectiveness of the Merger) was $21.90, and the closing price of a share of AAM common stock on April 6, 2017 (the effective date of the Merger) was $17.00.</footnote>
        <footnote id="F2">Reflects disposition under the Merger Agreement, pursuant to which each share of restricted stock of the Issuer was canceled in exchange for the Merger Consideration.</footnote>
        <footnote id="F3">Reflects disposition under the Merger Agreement, pursuant to which each restricted stock unit of the Issuer became fully vested immediately prior to the Merger and was canceled in exchange for the Merger Consideration.</footnote>
        <footnote id="F4">Represents an exercisable stock option, which was to vest and become exercisable in five equal annual installments (beginning on April 30, 2014), and with any previously unvested options being accelerated and becoming vested and exercisable under the Merger Agreement as of immediately prior to the Merger.</footnote>
        <footnote id="F5">Represents an exercisable stock option, which was to vest and become exercisable in three equal annual installments (beginning on August 4, 2015), and with any previously unvested options being accelerated and becoming vested and exercisable under the Merger Agreement as of immediately prior to the Merger.</footnote>
        <footnote id="F6">Reflects disposition under the Merger Agreement, pursuant to which each outstanding stock option of the Issuer was canceled in exchange for an amount in cash equal to (x) the aggregate number of shares of Common Stock underlying such stock option immediately prior to the Merger, multiplied by (y) the value of the Merger Consideration (with the Share Consideration being valued at $16.88 per share (the closing price of a share of AAM common stock on April 5, 2017 (the last trading day prior to the effectiveness of the Merger)) less the exercise price of such stock option.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Gary David Ford, attorney-in-fact for Mr. Jackson</signatureName>
        <signatureDate>2017-04-10</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SUBMISSION>
