Followup to this thread in case anyone is searching the forums for Chase Auto Finance like I did:
-On 8/28 I emailed GW letter asking for lates to be removed.
-On 8/30 got an email back that my request was being reviewed.
-On 9/5 I called them about another matter (paying off the loan) and had not received a reply to the email GW. So I asked the CSR about removing lates. She said she could remove one 30-day late - not the 60-day - which she did.
I might try waiting a few months and trying to get others removed.