another Auto Hub Issue/Question
I am having the same issue with mine.
I put it in 4h or 4L and it wont engage the hubs, unless i put the hubs on manual. So I read the thread, i took the hose off of the nipple that is on the spindle housing, I turned the key on , turned it to 4h and i can feel the line sucking. I put a vacuum gage on it, and its pulling about .75inches to 1in/lb. not sure if thats enough or not. But thats what i got, I then took the nipple out blew it out, it was already clean. did this on both sides.I checked for vacuum at the nipple side of the hose near the hub, its sucking, I checked vacuum right at the pump and its sucking also. I did the drive down the road in 4h and my defroster IS NOT still blowing. I read in the thread that the O-rings on the HUB themselves might need to be changed, so im going to get them. Is there another seal that might need to be changed(inner hub seal or or something?) I replaced my ball joints in Jan. 2010, Is there a seal on the axle that might need to be changed? or ? any other things to try?.. I checked all my lines they all seem to be good. and also i did the vacuum pump test, where i turned the key on and let the vacuum pump run, and it eventually turns off, so im assuming its holding pressure in the vacuum resevior.I know my solnoid on the transmission is engaging i can hear it.
Is there a way to tell if the hubs are bad or not? I read the link about cleaning them and greasing them up, is there a way to tell if the diaphram is bad in the hub? Not sure what else to check. When i turn the hubs to manual they do work. it will engage the front end. I dont really want to goto aftermarket hubs, I have center caps that have no holes them to access the hubs, unless i cut them not really at that stage yet. would rather fix what i have.
2000 F250 4x4.
Any help is appreiciated.