Re: Resurrecting my 56’ Patrician

Posted by HH56 On 2022/5/30 11:53:50

Also make sure the air vent is not plugged. Not sure if Packard used the same vent system on the 56 Dana rears as they did in earlier Packard built units but if so, look at the bolt holding the brake tube brass junction block on top of the left axle tube. If it has a crimped on metal cap over the bolt head that is probably a vent. Make sure cap is somewhat loose but still well attached. If there is no cap then the cap might be missing or vent may be somewhere else. Others more familiar with Dana axles can say where else to check.

Even if just a bare bolt holding the brass block I would say check anyway for possibility it is a vent and the cap might have been removed or fallen off. Look for a drilled passage thru the center of the bolt head. If there is a hole make sure it is open. Plugged vents have allowed heated lube in the differential to create enough pressure oil is forced out of seals.