This is very confusing. The goal of a WDH is to return all lost weight to the front axle. That is, your front axle with WDH engaged, should be at or near the front axle with no trailer attached. From that perspective, you need to transfer another 160 lbs (3860-3700). This would also reduce your rear axle weight into, or at least closer to spec.
But getting the front to 3860 would put you over the front GAWR by 110 lbs (3860-3750). Why are you so far over your front GAWR without the trailer? You either have very heavy front passengers, or you are putting something extremely heavy at the front of the bed.
Perhaps you need to get the truck weight without the trailer, and without any cargo or passengers. That is the condition you should be comparing to. Usually, front weight is not affected so much by a little cargo, but you're seems to be the exception.
thebrakeman ('70), DW ('71), DD ('99), DD ('01), DD ('05)
2004 Surveyor SV261T (UltraLite Bunkhouse Hybrid)
2006 Mercury Mountaineer V8 AWD Premier
Equal-i-zer WDH (10k), Prodigy Brake Controller