Just posting to give folks an idea of the changes with one washer using and Equalizer 4 with about 730 lbs tongue weight. Towing a st27bh with a Toyota Sequoia with factory air shocks.
Hit the scales a couple weeks ago and was only 150lbs below my rear axle limit, and didn't register much WD hooked up vs not.
So I measured again today and added a washer.
Front Wheel Well Empty: 35 3/4
Front Wheel Well Loaded no WD: 36 3/8
Front Wheel Well with WD and 6 washers: 36 1/8
Front Wheel Well with WD and 7 washers: 35 7/8
Rear Wheel Well Empty: 37 1/4
Rear Wheel Well Loaded no WD: 34 7/8
Rear Wheel Well Loaded with WD and 6 washers: 35 3/8
Rear Wheel Well Loaded with WD and 7 washers: 35 3/4
So I went from about 1.8 inches of sag to 1.5 inches of rear sag while returning the front to just shy of empty height. Again, increased from 6 to 7 washers with level WD bars.
With the air suspension after the truck is on everything returns to within 1/8 of empty measurements.
So 1 washer lowered the front 1/4" and raised the rear about 1/2"
The Sequoia has a very short hitch to rear axle distance which affects the geometry, so your mileage may vary.
