Quote:
Originally Posted by SummitPond
As identified above, your payload capability is the GVWR less the curb weight of the TV, and this is typically limiting on this category of truck. Thus your curb weight is 7,100# - 1,300# = 5,800#.
The GCWR (combined TV and TT) number is typically in the owner manual or in the manufacturer tow guide (found online), so in this case 7,100# plus whatever the TT weighs (use GVWR for both units to be conservative).
It looks as if your towing capacity is only 6,800#; I didn't look up your various models, but no matter what TV you use - this is also an important number to watch.
The axle numbers can only be truly verified by weighing your rig on a CAT scale or similar. Again, you don't want to be overloaded on this number either.
As an example, here are my numbers when we packed for a month-long trip followed by an extended (multi-month) stay at the terminus of our trip:
TV GVWR/GVW: 10,000#/7,900# (21% margin)
TV Steer axle rating/actual: 4,550#/4,100# (9.8% margin)
TV Drive axle rating/actual: 6,100#/4,580# (24.9% margin)
TV GCWR/GCW: 19,000#/14,540# (23.4% margin)
TV tow capacity/actual: 12,400#/6,620# (54.4%)
TT GVWR/GVW: 7,000#/6,620# (5.4% margin)
As you can see, the TV has 10% or more margin on all limits. I have tandem 3,500# axles on the TT, but the CAT scale doesn't provide individual values for each axle on the TT, only the TV.
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Ok, I have looked these numbers up in my owner's manual for my model number. I have a Doublecab 4WD, tow package, large fuel tank,
- GCWR: 16,000lb.
- TWR: 9,800lb.
So do I have this right?
16,000 - 7100 = 8900 = max trailer GVWR.
Is TWR towing capacity? So do I take the lesser of these numbers? (And I hear you on a % safety margin).
These numbers are higher than your examples, does this change your opinion?
It seems my limitation is really my payload?
Man this is like math class.