user75304: Right before the BCH fork a multisig (2 of 3) transaction was signed by the other party, and mine after the fork and successfully broadcasted (coinb.in), so got my BTC.
Later I realized there might be BCH in there as well, but broadcasting the same final raw hex on the Bitcoin Cash mainnet (viabtc.com) keeps failing. 
Am I missing something here? Or is it impossible because the other party's raw transaction hex code is not recognized on the BCH chain?
Broadcasting on blockdozer returns;
An error occured:
16: mandatory-script-verify-flag-failed (Signature must use SIGHASH_FORKID). Code:-26

user51948: You cannot simply rebroadcast a bitcoin transaction on the bcash chain, due to replay protection. You need to sign the transaction using the SIGHASH_FORKID as the error message says, which means you will need to use a BCH wallet to resign the transaction

75304: <p>Right before the BCH fork a multisig (2 of 3) transaction was signed by the other party, and mine after the fork and successfully broadcasted (coinb.in), so got my BTC.</p>

<p>Later I realized there might be BCH in there as well, but broadcasting the same final raw hex on the Bitcoin Cash mainnet (viabtc.com) keeps failing. </p>

<p>Am I missing something here? Or is it impossible because the other party's raw transaction hex code is not recognized on the BCH chain?</p>

<p>Broadcasting on blockdozer returns;
An error occured:
16: mandatory-script-verify-flag-failed (Signature must use SIGHASH_FORKID). Code:-26</p>
 51948: <p>You cannot simply rebroadcast a bitcoin transaction on the bcash chain, due to replay protection. You need to sign the transaction using the SIGHASH_FORKID as the error message says, which means you will need to use a BCH wallet to resign the transaction</p>
