389 cab air bag

You can't "soften" airbags. Take air out, cab height drops. Cab height drops, there's a risk it can bottom out and damage stuff. The shop isn't uninterested, they just don't want to see equipment get needlessly damaged.

 

You can probably find some videos of cab air bag replacement for a 389, but as already mentioned, air bags cannot be soften. Perhaps you have a different problem like worn cab mounts, particularly on older trucks. The bushings can go bad and make the ride not feel smooth. Another more common problem is bad shocks.

 

I would talk to the local Pete dealer, sounds like the ride height for the cab is too high.

 

his ride heigh on the cab is fine. Sounds like he is used to one of those sloppy cascadia cabs. the ones that rock back and forth when you climb in the truck. 379 and 389 dont move around like that. If you think that truck is a harsh ride, theres alot of people on here that would gladly trade with you.

 

Guess I was assuming the other trucks he was talking about having driven were also 389s at the same job. The only Pete I have any real knowledge about is an old 359, which doesn't have air ride on the cab or sleeper. Like I said, talk to the dealer and see where it's supposed to be at is the only way to know if there's any softening the ride.