GCWR

[geno87]

What goes into determining GCWR?

For example the only difference between an F350 CC V10 is gears 3.73 vs 4.30.

However there is a 3000lbs GCWR difference.

What causes the decrease in capacity? Less ability to get the load moving? Do to the gears, or less torque. I just don't get it.

[Tim_wants_a_Silverado]

Probably the acceleration tests. They must perform certain maneuvers in an allotted amount of time, I would think. So, since the 4.30s can get the load going quicker, they score quicker times thus can take more load.

------------------
'84 Chevy K10 Scottsdale 4x4. 305 V8. 700R4. NP 208. 3.08 gears. 3" Suspension Lift. 35x12.50R15 BFG A/Ts
35x12.50 BFG M/Ts on their way

[crewzer]

Tim's on the right track...

Subject to the truck chassis limits and holding everything else constant (i.e. tire diameter), there's pretty much a direct relationship between engine torque, axle ratio and GCWR.

In this case 20K GCWR divided by 4.30 is about the same as 17K divided by 3.73.