New Freight tractor...?

Which “Super 40’s”? DT 40-170 or DSH 40? I don’t like either because the DT 40-170 is 500# heavier and the DSH 40 is an odd ball to get parts for. 46 primaxx indicates DT 40-170. I’d get the smaller HP/torque engine to get DSP 40 rears for weight and parts availability.
AG 400 or AG 400L for suspension. Not exactly sure of the ride height difference or weight but the AG 400L would be cheaper to maintain and has more suspension travel. The AG 400 “walks” better and you can run with suspension deflated for a few miles with a blown airbag. AG 400L is dead in the water with a blown airbag.
3.36 and 3.42 is available between 3.55 and 3.25. You’ll have to research what speed/rpm is your “sweet spot”.
ETA: AG 380 is an excellent light weight, cheap to maintain suspension. I’ve found no fault in the AG 380 unless you’re pulling a RGN and you need occasional > #40,000 of strength on your drive axles.

 

Tare weight an issue. Well that new truck will be heavy no matter what with polar bear saving equipment hanging off it. Something like a Hyundai van be lighter than a dane. Im 32.4-32.6 with a 53 hyd plate van

 

20 years ago, when I knew how to spec a w9, the way to spec a lighter studio was:
22” tanks (to allow for 5/16” thick framerails instead of 3/8“) 255” wheelbase, AG380, DSP 40 rears. The 13,200 front shouldn’t make a noticeable difference in weight.

 

The MX is like 400 lbs lighter

 

Or the X12 lol still like 1700 or 1750tq plenty for 80k

 

Moved plenty of frac pumps at 100k with the 425/1650 and I was impressed better than volvo d13 and dd15

 

If weights an issue, drop the primax. You don’t need that for a dry van.

 

Thank you, a breath of fresh air. I was hoping you wouldn't say the "F" or "V" words. Sounds great, personally, I'm sick of shifting, but don't want an automatic, I'd go with a simple 10 speed and the 3:55's. No need to "split" any gears these days, and costly to repair. You'll have the power for the hills, as long as you aren't a clutch abuser, and since you aren't going trail blazing, a 10 speed should be just fine. Empty weight might be an issue, but skimping on tractor options, doesn't save much. Good luck

 

Why on earth would a self respecting owner operator NOT get a 13 or 18? They add very little weight and they are EVERY bit as dependable (unless you’re a real ####ty driver or you’re stuck in the 1980’s)!