After 11,000 miles of pulling with the trailer low in the front and the truck dragging its butt on the pavement I decided to get some air springs to level out the system. I made an appointment at The Spring Works in Grand Junction and they installed some Firestone Ride Rite air springs.
I’ve decided to set the system up so that the ride height in the rear is the same loaded as it is when the truck is empty. Then add in the tension of the Wt Transfer hitch to bring the front down to where it was with the truck unloaded as per the Wt transfer hitch instructions.
I started by measuring from a grove on the hub-cap to the edge of the fender well on all four wheels. The measurements are not all the same. There is about 1/2” difference from side-to-side. I suspect age as a factor in that. The front is about 2” less than the back which is to be expected.
Before air springs the trailer caused the truck to squat about 3.5” in the rear. After air springs (with 60 psi loaded. 50 psi unloaded) the air springs get the rear of the truck back up to where it belongs. Engaging the Wt Transfer torsion bars brings the front down to within 1/2” of where it was unloaded.
On the test drive the rear of the truck stayed put. It bobs WAY less than before and the ride up front is better. The front still bobs up-and-down when we drive over a rough spot in the road, but the energy needs to go somewhere.
For those of you keeping score at home this brings the truck’s trailer-towing modifications and repairs to about $12,000.