Stan,

While my truck has what many(myself included) are calling ‘two ton front axle’ since that allows late disc brake hubs/spindles to be easily added, the gross weight of 18,000 indicates it might be more than ‘two ton.’ Nowhere have I seen a connection to axle ton size and GVW. My wheelbase is about 156”. By the way, this is not the one in a previous post about frame shortening.

Ed

'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
'55 GMC 370 w/270, 420 4 speed, grain, dump bed truck from ND. Works OK.