[Jumbo]

Adding more air to the suspension air bags will throw off the driveline angles. Have a mechanic measure that to see if they need adjusting. You can check the cab air bags. Too much or too little air can lead to a rough ride.

[Mattangcobra]

Thanks for the replies. I'm pretty sure I'm going with the pete. I got to take the kw out one more time. Thanks for the input

[Steve Miller]

What Jumbo said, ride height makes all the diff. in both the KW and The Pete

[danj_otr]

The 8 bag suspension is different to drive that is for sure. I went from a '04 Volvo 780 to a '05 Peterbilt 379 and although it is smaller, it has a much better ride, easy to drive, but could use some more horses. Like the Pete you have as an option, mine has a Cummins ISX 475 horse, and an Eaton-Fuller 13 Speed.