[Americanrider]

After doing a little brainstorming last night I'm thinking that the calipers are frozen. I purchased the complete axle second-hand and who knows how long it had been sitting out in the rainy NW weather. Since I got it in September it's been outside until 2 weeks ago when I rented a shop to finish up the work. The lines where plugged off but there was very little if any fluid in them when I connected the hoses.

The calipers are installed correct, new bleeder valves. All wheels spin when lifted, I just put on a different set of rims & tires last week.

As far as the rod goes I have done one adjustment on it, making it a little longer, also had adjust the stoplight switch (a major PITA, I love standing on my head under the dash!) to turn the brake lights off when the key is on.

This is a new [to me] system, so what would be the "correct adjustment?" I have reversed the booster linkage levers and lubed the lower pivot shaft so that the top ends do not knock on the firewall. Since I don't have free pedal travel it's hard to figure what adjustment on the rod is correct. How much travel should the upper rod have? With the pedal up there is about 3/8 inch between the booster lever arms and the firewall. The pic enclosed is not my truck but just as an example. The rounded ends of the lever now face the firewall.

I have a spare set of calipers I'm going to try next. It's a good thing 1/2 ton & 3/4 ton Dana 44's use the same caliper.