dw1gator wrote:
Its possible thinking back. But I dont understand what you are seeing. Thers a 20# difference on the front axle and a 60# difference on the rear. Where do you get the 240# ? And that brings up a question. Where should one stand while weighing?
Your data indicate a load of 100# was transferred to the TT's axles when WD was applied.
This load is equal to about 13% of the indicated 760# tongue weight.
Based on assumed dimensions of:
TV wheelbase = 116",
ball overhang (longitudinal distance from TV's rear axle to ball) = 58",
and distance from ball to mid-point between TT's axles = 240",
a load transfer of 100# to TT axles would cause approximately:
255# to be added to the steer axle, and
355# to be subtracted from to the drive axle.
For the "WD engaged" weighing, the axle loads should have been approximately:
2900+255 = 3155# on the steer axle, and
3980-355 = 3625# on the drive axle.
The steer axle would have been about 3300-3155 = 145# lighter than when unhitched.
Instead, your data showed:
2880# on the steer axle (suggesting that 3155-2880 = 275# was "lost" from the steer axle), and
3920# on the drive axle (suggesting that 3920-3625 = 295# was "gained" by the drive axle).
On average, the data suggests that about 285#, which was on the steer axle pad during the "WD not engaged" weighing, showed up on the drive axle pad during the "WD engaged" weighing.
(Note: in the previous post, I assumed 240# was moved based on assumed dimensions for a Suburban rather than a Tahoe.)
The driver and all passengers should be in the same seats for all three weighings.
Some drivers use a short pole to press the call button while seated in the TV.
Ron
P.S. I think you're very wise to try to understand how your axle loads change when weight distribution is applied.
