The one time that happened to me was in VERY similar condition as you described. It hasn't happened since.
Has the juddering issue been resolved since the part was replaced or has the juddering come back?Had the same problem, took it to the dealer, they changed the Electric Coupling Assembly car drives like new, I attached what they changed.
I wanted to double check to see if the shudder issue came back on your QX60. I have a 2016 QX60 with the judder issue and it has only a few months warranty left. I a getting ready to take it in to the dealer to see if they will fix this problem.Had the same problem, took it to the dealer, they changed the Electric Coupling Assembly car drives like new, I attached what they changed.
I found this document online. https://static.nhtsa.gov/odi/tsbs/2018/MC-10145543-9999.pdfThe differential coupling fixes this issue and the coupling is over a grand. I have a 2014 and have the same issue. I got on eBay and found a guy who buys stock from businesses that are going out and he had 3 brand new ones for 338 each. I got one and worked perfect. Still two more listed and if you need info ask I’ll post the info. I’m not sure what model years it fits but I think the part number Is 38761-3KA0A. Check it out and I posted a pic of the listing on the other topic on this issue tapping noise or something similar to that.