Ford Super Duty (1999-2016) :: 2001 F250 - ESOF Vacuum Knuckle Connector
May 22, 2017
I am in the process of rebuilding my front end and have found that the nipples that screw into the top of the knuckles for the ESOF system are rusted and need replacing. I'd like to keep the system as close to original as possible, but have had no luck in finding a replacement. What the appropriate Ford part number is or where I could pick up a suitable replacement. This would be for a 2001 F-250 4X4 with the V10.
View 2 Replies
Advertisement
The transfer case on my 2001 F250 Powerstroke will not engage when the ESOF is switched to 4hi or 4lo. I checked the fuses and they are good. I removed the electric motor on the side of the transfer case and while it was hanging down with the two plugs attached I did not see any movement when the dash switch was moved to the 4hi position. I used a wrench to manually shift the transfer case and still did not get the transfer case to engage. What next?
View 9 Replies
I have a 2001 F250 4x4 and the ESOF switch not engaging hubs, currently I have no 4x4 lights coming on in the cluster when i turn the switch. I am not experiencing any of the vaccum symptoms that most people are suggesting. I When I turn the switch i also do not hear any relays clicking. Relays have been tested, and i waited for the 45 second transfer delay that the manual mentions. ESOF switch has power, and is working properly (I know because I bought a new one in attempt to fix the problem) Basically I have no responses from any of my 4x4 indicators or parts.
View 14 Replies
Truck has been neglected for a while so this upgrade/repair I installed Powerstop brake rotor, caliper, bracket and pads. New Timkin wheel bearing, Moog U-Joints, and new inner/outer axle seals. Also replaced all the brake hoses and the remaining original rusty brake lines. About a month before I replaced the failed Auto/Manual vacuum operated locking hubs with Mile Marker units, which do not need the vacuum line, the drivers side was missing. and was letting water into the wheel bearing. So I decided to plug them and remove the vacuum lines from under the hood as well.
If there is interest I can get pictures of the vacuum lines, and what I changed under the hood. That was pretty self explanatory.
Could not find a google search for the thread size of the vacuum nipple in the knuckle. It is a 3/8"-24 fine thread.
[URL]
View 2 Replies
I noticed that my 4WD is only working now when I manually lock the hubs in (they have that options!), and the air blows out the defroster when I shift, so it looks like I have a vacuum leak. Where are the typical leak points on a 2006 F250? What's the best way to confirm a leak (other than just replacing all of the hose)?
View 2 Replies
I have 2 issues and wonder if they are related. I don't have a CEL but I'm getting a P0442 DTC with my code reader - EVAP system leak detected
Also, my ESOF doesn't work. The hubs will lock manually. Can this be related?
I've already cleared the code and it came back. My ESOF hasn't been working for a while but I just haven't had the time or motivation to look into it until now.
I tried the HVAC Test and there may be a slow leak in the system. I can get the vents to switch from defrost to face vents but it switches halfway back to defrost, both are on at the same time for 20 seconds, then it recovers and goes back to the face vents.
My 4wd relays seem to work as well.
View 8 Replies
Replacing the knuckle/axle seal due to my hub not holding a vacuum. I finally got the seal off the axle after several minutes of beating, but it finally came off. During the beating the metal shield that was in back of the seal took a beating as well and can not be reused. Is it really needed?
In this thread the pictures show that the shield was not installed after the seal was replaced. The shield does serve a purpose to keep crap out of the seal though.
View 8 Replies
Should there be any play on the backside offront hubs (knuckle)? When I grab the knuckle where the sticker is theres alittle bit of wiggle/play especially on left side, little less on right. The truck is 2009 and has only 11,000 miles on it.
View 4 Replies
I am having some issues with my 2003 f250 6.0l 4x4. I cannot get the 4x4 to engage. There are no lights on the dash and no power to the switch other than the light. It doesn't matter if I have the hubs in lock or auto. It just seems like i have no power to the system. I have check all the fuses and they all check fine. I also check the transfer case motor and it seemed fine. I must be missing something. This truck is worthless without 4x4.
View 14 Replies
A buddy of mine has a 99 F250, and the 4WD stopped working. The 4wd light in the dash does not turn on with the key with the rest of the lights. There is a Low Range light that does turn on. He took it to a shop/dealership and they said the vacuum was good. They also swapped in a different GEM module, which didn't change anything.
I swapped the relays under the hood - no change. I keep reading that there is a two wire plug on the transfer case I can test for voltage or to manually power the motor. Where is it? I see two plugs - the blue one on the left has 4 wires, the black one has more. Or is that not the shift motor I need to be looking for?
View 6 Replies
I have a 2000 f250 CCSB 4x4 with the ESOF auto hubs. The auto hubs won't engage automatically. They work fine manually. The transfer case is engaging and correct lights are coming on. There is a little bit of vacuum coming from the vacuum switch but it doesn't seem like much to me. All the dash HVAC controls work fine though. I Lubed and cleaned inside the hubs according to Guzzles directions.
While torn down, I blew through the vacuum port on the outside of the hub and there was little to no restriction. I don't think there is enough vacuum to pull the hubs, but is that possible if all the dash controls work fine? What pressure should it take to engage them? My next step is to pick up a vacuum pump and see if I can engage them with it.
View 6 Replies
I have a 2006 F250 XLT 6.0 diesel. I bought last month to haul my fifth wheel. Looking for the wiring diagram for the "under hood lamp". I have no power at the connector of the under hood lamp. I have checked all the fuses in both locations (battery box and central junction box) and did not find a blown fuse. The under hood lamp is not listed on the the central junction box fuse and relay posting in the owner manual. Is it controlled by something else?
View 2 Replies
I have a 2010 f 250 super-duty and i cannot get vacuum past the solenoid mounted on top of the radiator. Ford has given me nothing but bad advice. I know i have a vacuum leak after the solenoid and need to replace the lines going to the two hubs but when i switch on the 4wd and hook up a vacuum gauge the vacuum is good up to the solenoid about 12 inches. i constantly have 12 volts going to the center lead but nothing else in the other two leads either in 4 high, 4 low, or 2wd. Am I missing something here? shouldn't there be a voltage change when i turn the switch to 4wd to actuate the vacuum solenoid to let the vacuum pass thru the solenoid? I have tried replacing the solenoid but that did not work. Also use rubber vacuum line and make at down to the hubs?
View 4 Replies
I recently picked up a '99 F250 Super Duty with the 6.8L V10 for a song.
The 4 wheel drive hubs are not working with the vacuum. If I use the manual lock on the hubs all is well. I ordered the Innova 31703 CarScan OBD2 + OBD1/ABS/SRS Scan Tool. It says it does Trans codes. I am hoping it will cover the 4 wheel drive too.
Maybe related, the heat is always on. Meaning I feel heat at my feet when the temp dial is cold and fan is off. I can't find the heater control valve to check the vacuum line.
View 14 Replies
2002 F250 SD 4X4 5.4L. 4.5 inch pro comp lift tire size 305/75/R16. K&N cold air set up. 208,000kms
I know the truck does horrible on gas but lately is been getting worse, maybe I am getting 350km to a tank. Mixed highway city driving. Sounds like I might have a vacuum leak somewhere but I have no engine light. I've had the truck since last year and put about 10,000km. on it done regular oil changes .. brake maintenance no motor work so far.
View 2 Replies
2000 6.8 v10 F250 supper duty crew cab. 4x4 high switch's on (manual lock hubs installed) but 4x4 low will not engage. Brake input/out put tested good. Trans switch Park/"N" both test good. PCM reads switch output in all modes, (dash 4x4 selector). The only other issue I am having is the Vacuum is bad ( defrost default no blend door operation). Would vacuum loss prevent 4x4 lo range engagement (with manual hubs ) or should I go to the solenoid, relays on the case/ right fender?
View 4 Replies
I have a 2013 F250 which has both the Manual and auto locking hub feature. I tried to plow my driveway this morning and after making one pass I put the truck in reverse and could not back up my steep driveway. The truck is showing locked in 4x4 on the dash, the 4x4 control is in high lock but the front wheels will not turn. It has been very cold here lately (-30) and I'm wondering if the vacuum lines for the auto locking hubs have frozen. I have switched the control out of 4x4 and back in several times, and it does lock in again, but as soon as I put the truck into reverse, they unlock again. The hubs are covered with ice and snow right now so I have not yet tried to manually lock them.
View 14 Replies
My 1999 F 250 5.4 liter. I know I have a vacuum leak because whenever I accelerate the air conditioning coming from the vents switches to the defroster. So my question is how do I go about finding the leak? My hubs in the front are manual so I know I don't have lines going up there. I do have some mechanical capabilities I've changed water pumps alternators brakes etc. But never anything with vacuum lines or a/c.
View 14 Replies
I have a 2000 Ford F-250 that I have just replaced the tie rod ends on both wheels. The hole where the tie rod attaches to the right steering knuckle getting wallowed out? When I turn the wheel I can see the tie rod end rocking back and forth.
Now if I keep tightening it down it would pull it down past the cotter pin hole exposing way more threads than any to the other tie rod ends. I've searched everywhere and can't find anything that refers to this problem.
View 6 Replies
My 2004 f250 ball and u joint replacement job is at a bit of a stand still. Tore it down, brought the knuckle and axle shafts to an ex mechanic I know, because he has a 20 ton Harbor freight shop press. He mostly used a hammer, bashed out the old ball joints (I already had removed the u joints). U joint turned out fine.
I did notice the upper ball joint protruded a very slight bit on one side in the knuckle, meaning you could feel with your finger on the underside of the joint and on the one side it is not exactly flush with the interior of the knuckle. I would say it protrudes no more than a thirty second or so.
I brought it home, installed the boots on the moog joints, (the bottom was unusually difficult to put on), greased the joints and hung the knuckle on the axle tube, by a few turns on the lower joints nut. I then inserted the camber sleeve on the top stud, torqued the bottom to 49 fp then the top to 67 and finally the bottom to 150. End result, very stiff movement on the knuckle. No tie rod attached, and it takes to hands to move it from the "stopped" position,(turned all the way). I am sure it is stiffer than when I did the other side.
I tried loosening the nuts completely, same stiffness. I redid the torque sequence, no change. Tried hammering the ears around where the joints seat no improvement. The fellow who installed into the knuckle came and took a look. He agreed the knuckle was stiffer than you would hope, but, he suggested Putting it all together, as he believed they would loosen up before too long. I am not sure whether to try that, or remove the knuckle now, and redo with new joints. Pros and cons to either approach.
My question is : Does a knuckle become more sketchy by the time it is dealing with the pressing of a third set of ball joints? If I finish the install now, will a stiff knuckle action lead to other mechanical wear within a thousand miles or so, while I wait to see if they loosen up?
View 3 Replies
I have a 2001 F-250 7.3 diesel with an automatic trans. Over the last couple of months it has stalled 3-4 times while driving, always when slowing down but even at speeds of 15 mph or so. I did find a burnt vacuum line the other day. It comes out of some type of relay box located behind the battery and in front of the starter solenoid relay and is mounted on the fender. It has an electrical plug in the top and two vacuum lines at the bottom. I am hoping this is the cause of the truck dropping off of the idle circuit? But I don't know what the unit is so I cannot order the correct replacement lines.
View 9 Replies
