What make\model trucks have single 40k rear end?

A 20k lb axle would probably be fine. Got to remember that when you weighed the twin screw you had 2 axles and 8 tires there. You'll lose the weight of 1 complete axle and suspension assembly off that number.

 

He can also put a little more weight on his steeraxle.

 

Alright some makes and models ?

 

I know this is a vague answer but literally any truck make/model you want. Trucks (especially older ones) aren't built to cookie-cutter specs like cars are. There are dozens of options to choose from. You could line up 15 trucks of the same make/model and I bet no 2 would be absolutely identical.

 

Really any will work.

Freightliner or Mack or what ever.

You don't need anything that will haul heavy and your choices are limited to how much you want to spend and what you want in it (18 speed, sleeper?, super duper seats).

I've had Freightliners at the beginning, they were OK, rattled a lot and didn't know what a real good truck with good fitting interior was like until I drove other trucks. so M2-112 may even work. There are enough Cascadias on the market coming off of lease that could also work. Some are cheap.

I went to Macks after getting a few for other drivers to drive, little problems cropped up, like for me it was ECM firmware issues that needed to be sorted on four of them. BUT buying new and no issues.

I also have western stars which I like, the fit and finish isn't the best - sometimes i think it is an overgrown frieghtliner - but have had little trouble with the truck, more problems with lift axles on them.

Borrowed a KW T-880 recently for a few days to move a bunch of trailers, it was nice, good comfy ride.

SO it all depends on what you like, it is not really saying what specific truck to fulfill your needs because you are not running heavy at all.

 

Any two axle would work. You'd chop ~2,000 lbs off the drive axle weight going to a single drive when you chop a whole drive axle off, plus the power divider and its associated hardware.