Gentlemen;
I think were getting "off trac" here, as the purpose of 're-designing' anything is to upgrade it, not the reverse.
All trucks have a GVWR (gross vehicle weight rating) by the MFG where passenger cars do not. This is because cars carry their weight evenly over both axles/all 4 wheels.
Trucks 'on the other hand', carry their weight to the rear of the wheelbase (center) over the rear axle(s) and this is why they are built differently (extra heavy)etc.
The Spicer type 'rear ends' are similar as stated, but the truck ones are desinged for trucks and have this extra load capacity.
If we all could say his truck would never carry a load (ever), then it wouldn't matter a bit what he put in there.
Happy trails.
