Training puppy to travel in the trunk with older dog who hates the car

Hey all!

So, I have an 11-week-old puppy who does pretty well in the car right now. He travels in the backseat in a crate for now, and he just chills in there without issues.

This is not the case with my older dog, who, despite my best efforts when she was a puppy, still does not enjoy riding in the car. We give her a licky mat or a Kong, and she's pretty happy with those for the most part until she's done with them, whines, howls and scratches for a while, until she falls asleep. I'm not happy about it, I'd much rather have her be happy in the car but she just has always hated any forms of confinement. She used to travel in the backseat, but after discovering that she does much better when she can't see us humans, we moved her in the trunk, where she travels in a sturdy carrier.

Now, I'd like my puppy to also travel in the trunk. We were planning on getting a double carrier with a divider for them. Do you think the 15 minutes of chaos from my older dog will rub off on my puppy and make him think that he, too, should fear the car? I was planning on introducing him to the trunk travel on his own first without my older dog, but I still fear my older dog will scare him later.