Company won't fix truck pulling hard right

No idea what to do. Have been through 4 trucks already that I got swapped out of for random reasons -- one got traded, one needed a routine overhead and I was under a load with no time to spare, etc. Not a veteran, but not a rookie either. I've been in enough trucks to know this one drives exceptionally bad. Thankful they put me in a new truck, but can't stand making a left turn for 60 hours a week and fighting the thing constantly. Call me soft or whatever, but its like wearing wet socks. Just a constant nagging irritation. Can't imagine it's the right move financially either. It'll start wearing the heck out of 10 tires soon and then the issue will just get exacerbated and I'll be wasting even more time. They'll be wasting more money.

Got put in this truck, brand new, so I'm thankful for that of course. At 40,000 miles now and a few weeks ago, it developed a hard pull and drives like **** around left hand curves. I can get it down the road safely, but it's still a pretty extreme pull. If I was to let go of the wheel, it'd go from the driving lane to the shoulder in just 2-3, seconds. Any bump makes the wheel jump to 2 o'clock, and it pulls even harder right. First time I took it to the company shop, they just greased it. Not going to fix a hard pull, but whatever, and of course, no change. Second time, they aligned it and it wasn't fixed. And now the third and fourth time has just been the 'we'll take a look at it' just for absolutely nothing to get actually done. 30 minutes later, called on the intercom that truck is done and not a single thing has changed.

I have a few hiccups on my record so I can't just find a new job. It's not a DOT violation for a truck to drive like ****, so can't use that approach. I could probably request a different truck, but if this is their approach with the one I'm in, I doubt the next one's going to be any different.

I'm not going around thumping curbs and hammering potholes, every tire is set exactly 100 and 105-110 steers, and I pre trip truck and trailer thoroughly.

What would you all do? Just ride it out since I don't have much leg to stand on here or at any other company? Try and talk to someone higher up? Idk.

 

any ideas on what it could be? Not a whole lot to add to the story. Truck drove reasonably well, Truck began pulling substantially to the right, and any damages or causes have not been identified yet by mechanics at company shop. Noticed on a trip from Missouri to Colorado. Trip before was Cincinatti to Missouri.

As far as more info on the pull, the wheel naturally wants to pull itself to 2 o'clock regardless of speed or crown in the road. Tracks perfectly at 12 o'clock, but of course requires steady pressure to keep it there. If I hit a bump, it'll 'jump' to 2 o clock. Not enough to pull out of my hand, but will do it if you let go and just rolling through a bumpy parking lot or something. It won't pull itself past that point.

As far as being unsafe or not, I wouldn't say unsafe as far as driving. Just irritating. As far as something letting go, I don't know. No other symptoms and 'checked out' on 4 different occasions. Not saying that means the truck is 100%, but if something critical was going on, I'd think it'd have been discovered. Maybe not. I can only check as much as I know and that's hubs, brake adjustment, tires (to an extent with truck on the ground), visible cracks, bent components, etc.