Forum Discussion
SoCalDesertRid1
Sep 02, 2016Explorer II
The small Isuzu, Mitsubishi-Fuso, NPR, Hino, etc class 4 and 5 (GVWR's from 13,000-20,000 lbs) local delivery day-cab cabover trucks are typically underpowered, with small engines. They have good payload capacity for carrying cargo, good fuel mileage, good turning radius and maneuverability for downtown driving, which are all good attributes of a local delivery truck, but they don't have much power for towing a heavy trailer, especially in the mountains.
They are also not comfortable. The cabs are small and they are loud inside, with the engine right under the front seats.
The larger American conventional class 6-7 trucks from Freightliner (M2, FL60/FL70), International (4000-series) and Ford (F650/750) have much bigger and more powerful engines that have no problem pulling heavy trailers up mountain grades and have larger cabs for long trips. They're available with 4-door crew cabs with air cab, air seats and air rear suspension. The Internationals are available with 4wd too.
My International 4800 has the DT466 7.6L inline-6 diesel with 250 hp and 850 torque rating, with the Allison 3000 tranny with retarder. It's a great drivetrain with lots of power. The chassis is 33,000 GVWR with air brakes. It has a huge 4-door crew cab with air seats that makes my F350 crew cab's cab feel tiny. It also has 4wd. It doesn't have air cab or air rear suspension, which would be nice. Those things are available though.

They are also not comfortable. The cabs are small and they are loud inside, with the engine right under the front seats.
The larger American conventional class 6-7 trucks from Freightliner (M2, FL60/FL70), International (4000-series) and Ford (F650/750) have much bigger and more powerful engines that have no problem pulling heavy trailers up mountain grades and have larger cabs for long trips. They're available with 4-door crew cabs with air cab, air seats and air rear suspension. The Internationals are available with 4wd too.
My International 4800 has the DT466 7.6L inline-6 diesel with 250 hp and 850 torque rating, with the Allison 3000 tranny with retarder. It's a great drivetrain with lots of power. The chassis is 33,000 GVWR with air brakes. It has a huge 4-door crew cab with air seats that makes my F350 crew cab's cab feel tiny. It also has 4wd. It doesn't have air cab or air rear suspension, which would be nice. Those things are available though.

About Fifth Wheel Group
19,025 PostsLatest Activity: Oct 09, 2025